Annual Report 2011-2012

INSTITUTE OF PHYSICS BHUBANESWAR INSTITUTE OF PHYSICS Address P.O. Sainik School Bhubaneswar - 751 005 Odisha, India Phone: +91-674- 2306 400/444/555 Fax: +91-674- 2300142 URL: http://www.iopb.res.in

Editor Suresh Kumar Patra

Published by C. B. Mishra, Registrar

Compilation Rajesh Mohapatra Contents

About the Institute

The Governing Council

From the Director’s Desk

1. Facilities ...... 01

2. Academic Programmes ...... 17

3. Research ...... 23

4. Publications ...... 57

5. Seminars and Colloquia ...... 67

6. Conferences & other events...... 77

7. Outreach ...... 89

8. Personnel...... 93

9. Audited Statement of Accounts ...... 101

About the Institute Institute of Physics, Bhubaneswar is an autonomous research institution within the Department of Atomic Energy (DAE), Government of India. The Institute was established in 1972 by the Government of Orissa and continues to receive financial assistance from them.

The Institute has a vibrant research programme in the fields of theoretical and experimental condensed matter physics, theoretical high energy physics and string theory, theoretical nuclear physics, ultra-relativistic heavy-ion collisions and cosmology, quantum information, and experimental high energy nuclear physics. The accelerator facilities include a 3MV Pelletron accelerator and a low-energy implanter. These are being used for studies in low energy nuclear physics, ion beam interact ions, surface modification and analysis, t race elemental analysis, materials characterization, and radiocarbon dating studies. The accelerator mass spectrometry (AMS) facility has been routinely accepting samples from the external users for dating applications. One of the important areas in our Institute is in the field of Nanoscience and Nanotechnology in general and surface and interface studies in particular. The Institute has several advanced facilities for sample preparation and for the study of various physical and chemical properties of nanostructures and bulk condensed matter systems. The Institute is actively involved in the International Collaborations at CERN (Switzerland), BNL (USA), ANL (USA), GSI (Germany), and other laboratories abroad.

The institute offers Ph.D. programme to the scholars who successfully complete the one-year pre-doctoral course. The selection for the pre-doctoral programme is through the Joint Entrance Screening Test (JEST). Candidates qualifying the CSIR-UGC NET examination and those having high GATE scores are also eligible for an entry to the pre-doctoral program.

The institute campus has housing facilities for the employees and hostels for the scholars and post-doctoral fellows. Compact efficiency apartments are available for post-doctoral fellows and visitors. Both indoor and outdoor games and sports facilities are also available in the campus. The Institute facilitated a mini-gym in the New Hostel. The institute also has a guest house, an auditorium, and a dispensary in the campus.

The Institute celebrates the Foundation Day each year on 4th September. The Governing Council Chairman Prof. S. K. Joshi Distinguished Emeritus Scientist CSIR and Honorary Vikram Sarabhai Professor (JNCASR) Room. No. 250, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi - 110 012.

Members

Prof. T. K. Chandrashekar Shri V. R. Sadasivam, IDAS Director Joint Secretary (Finance) National Institute of Science Department of Atomic Energy Education and Research(NISER) Anushakti Bhavan, Institute of Physics Campus Chhatrapati Shivaji Maharaj Marg P. O. Sainik Schol Mumbai - 400 001. Bhubaneswar - 751 005. Dr. C. S. Kumar, IAS Prof. Amitava Raychaudhuri Commissioner-cum-Secretary Sir Tarak Nath Palit Professor of Physics Department of Higher Education Department of Physics Government of Odisha University of Calcutta Bhubaneswar - 751 001. 92 Acharya Prafulla Chandra Road Kolkata - 700 009. Prof. Y. N. Mohapatra Head, Department of Physics Dr. S. Kailas Indian Institute of Technology, Kanpur Director (Physics Group) Uttar Pradesh - 208 016. Bhabha Atomic Research Centre Trombay, Mumbai - 400 085. Prof. Simanchal Panigrahi Department of Physics Smt. Revathy Iyer, IA&AS, (Up to 29.02.2012) National Institute of Technology Joint Secretary (R&D) Rourkela - 769 008. Department of Atomic Energy Anushakti Bhavan, C.S.M. Marg Prof. A. M. Jayannavar Mumbai - 400 001. Director, Institute of Physics Bhubaneswar - 751 005. Dr.C.B.S.Venkataramana, IAS, (From 1.3.2012) Joint Secretary (I&M) and I/C JS (R&D) Secretary to the Governing Council Department of Atomic Energy Shri C. B. Mishra Anushakti Bhavan, C.S.M. Marg Registrar, Institute of Physics Mumbai - 400 001. Bhubaneswar - 751 005. From the Director’s Desk . . .

This is the Annual Report of Institute of Physics, Bhubaneswar for the period 1st April, 2011 to 31st March, 2012

The report describes various facilities available in the Institute. It also gives a brief description about different research activities, being persued by its members, highlighting the publications in the respective areas. In addition, seminars, colloquia, conferences, etc., which were organised during the last one year have also been included along with other significant events.

Arun M. Jayannavar

1

1 FACILITIES

1.1. New Experimental Facilities 3

1.2. Existing Experimental Facilities 4

1.3. Computer Facilities 14

1.4. Library 15 2 3 Facilities 1.1 NEW EXPERIMENTAL SET-UP SQUID VSM ut ilizes a superconducting magnet (a solenoid of superconducting SQUID, VSM wire) to subject samples t o magnet ic fields up to 7Tesla(70 KOe). The squid and The SQUID-VSM lab consists of Quantum magnet is cooled with the help of liquid Design MPMS SQUID VSM EVERCOOL. The Helium. Liquid Helium is also used to cool magnetic property measurement the sample chamber, providing syst em(MPMS) is a family of analyt ical temperature control of samples from 400K instruments configured to study the down to 1.8K. T he SQUI D VSM can be mag n et ic used to basically perform M-T,M-H and ac propert ies susceptibility measurements at a of samples magnet ic field ranging up t o 7T and ov er a temperature ranging from 4K to 400K. b r o a d range of Spectral Response System temperatures a n d This system (procured from Sciencetech, mag n et ic Canada) includes a 150 W Xenon light f i e l d s . source, a monochromator to t une the E xt r emely light source, and the necessary probes to s e n s i t i v e att ach to the sample. A source meter mag n et ic used as an active load permits operating measurements the test cell at various load conditions, are performed wit h superconduct ing including short-circuit, compensating for pickup coils and a Superconducting a series resist or required t o sense the Quantum I nterference Device(SQUI D). current produced by t he modulated To optimize speed and sensitivity, t he monochromatic light. This sensed current MPMS SQUID VSM utilizes some analytic plus a reference signal at the frequency techniques employed by vibrating sample magnetometers (VSMs). Specifically, the sample is vibrated at a known frequency and phase sensitive detect ion is employed for rapid data collection and spurious signal rejection. T he size of t he signal produced by a sample is not dependent on the frequency of vibration, but only on the magnetic moment of the sample, t he vibration amplitude and the design of the SQUID detection circuit. The MPMS Facilities 4 of the light modulation are both fed into ( 2) Current v ersus t ime (response of the precision lock-in amplifier t o allow photocurrent) or in simple word one measurement of the photocurrent can measure switching effect generated by the modulated monochromatic light. (3) Photoconductivity of a thin film

By a combination of resistivity setup and (4) Band gap spectral response system, one can (5) Defect density in the band gap measure these parameters of thin films:

(1)Photocurrent versus voltage charact eristic with fixed or variable wavelength.

1.2. EXISTING EXPERIMENTAL FACILITIES

Ion Beam Analysis Endstation In addition, it can be used for accurate determination of thickness of an Recently we have installed an ion amorphous thin film, consisting of light beam analysis endstation in the general- elements, deposited on a single crystalline purpose beam line at t he I on Beam substrate of a relatively heavier element. Laboratory. This endst ation is a unique On t he ot her hand, low-energy ERDA one in the country which is dedicated for helps in absolute determination of user experiments based on ion beam analysis techniques, viz. R u t h e r f o r d backscattering spectromet ry ( RBS), RBS- channeling, and elastic recoil detection analysis ( ERDA ). While RBS is meant for depth profiling of heav y element s, RBS- channeling is capable of analysis of single crystals and epitaxial layers to determine crystalline quality, amorphous layer thickness, degree of disorder, and atomic site. 5 Facilities hydrogen and its isotopes in a (M/S Raith GmbH) and transmission simultaneous fashion and in a non- electron microscopy specimen dest ruct iv e way. T he syst em can be preparation using lift-out methods. The upgraded to add proton induced x-ray objective is to understand the emission (PIXE) technique for trace combinat ion of bot t om-up and t op elemental analysis in materials. The down process in self-assembly of endstation is equipped with a load lock nanostruct ures. This would help us t o system and a rectangular sample holder, create a new methodology that would which can accommodate more than ten help to grow at omic scale devices, to samples at a single load. These eliminate the need for exposing the chamber to the ambient and frequent disruption in experiments. The samples can be precisely posit ioned in front of the ion beam with the help of XYZ motors and monit ored by a CCD camera. All gate valves and the vacuum pumps are coupled to the interlocking system which rules out meeting a v acuum related accident. In addition, the chamber is equipped with two surface barrier detectors – one dedicated for RBS measurement s and the ot her one for ERDA measurements. They are coupled to the respective set of electronic understand the struct ural aspects of modules and the data acquisition system nano to micro – scale structures, and to is interfaced with a computer. prepare site-specific TEM specimen using the SEM and FIB facilit ies. The electron FEGSEM-FIB facility beam energy can be varied between 100 eV to 20 keV and t he Ga ion beam energy can be varied in the range of 2 – The Cross-Beam facility consists of a 30 keV. The images can be made with field emission based scanning elect ron sub-nm resolution while the features can microscope (FEGSEM) and a focused ion beam (FIB) system. T he facility also has be made of dimensions ~20 nm. other useful accessories to elemental mapping with x-ray florescence (using Cyclic Voltametry energy dispersive spectrometry (EDS)), scanning transmission electron A Potentiostat- Galvanostat, from microscopy (STEM), e-beam lithography Autolab, has been procured which can Facilities 6 be utilized to investigate the electroanalystical properties like electrocatalysis, elect rodepost ion for semiconduct ors, dielect ric materials, polymers, membranes etc. Cyclic Voltametry is an effective technique to study redox systems. It enables the electrode potential to be rapidly scanned. In cyclic Voltametry experiment the working electrode potential is ramped linearly versus time. The v olt agrams are ut ilized t o st udy t he equipped with a load lock chamber and electrochemical properties of an analyte a 5-axes sample manipulator. The sample solution. Application areas include st age has both low ( LN2) and high- conductive coatings, polymers, temperature (1000°C) stages for creating semiconductors, batteries, fuel cell, super nanostructures at different sample capacitors etc. t emperat ures. One can measure the target current from the sample stage itself, while the ion current is measured by bringing in a shutter in front of the ion beam path.

DC/RF Magnetron Sputtering

We have installed a pulsed DC/RF magnetron based sputter deposition unit. Ion beam etching induced surface The unit has four sputter guns where two nanostructuring are dedicated to operate with pulsed DC supply and the other two are connected We have facilitated a low energy to RF power supply. The substrate is made (50 eV – 2 keV), broad beam (I in. to rotate during film deposition towards diameter) electron cyclotron resonance having high-quality uniform films. One can (ECR) source based ion beam etching put the substrate holder at a high facility for creating self-organized surface temperature (up to 600 degree nanostructures. The source is equipped Centigrade) for film growth at elevated with a differential pumping unit for temperat ures. We have an addit ional working at a bett er chamber vacuum and dedicated gun for deposit ion of during the ion etching process. The ion t hree-dimensional nanostructures by source is coupled with a UHV compatible using glancing angle deposition. Further, sample processing chamber which is we have a load lock and a plasma 7 Facilities chamber for making nitride and/or oxide starting from protons and alphas to heavy layers in vacuum. We can grow thin films ions. Commonly used ion beams are that of semiconductors, metals, and of H, He, C, N, Si, Mn, Ag and Au. Multiple compounds hav ing a wide v ariety of charge states are possible for the MeV morphology and grain size. In turn, their energy positive ion beams. Argon is used physical properties can also be tuned. as the stripper gas to produce positive Research using this facility is aimed at ions. The most probable charge state for developing advanced materials having heavy ions (carbon or above) is 3+ for novel structures and tunable properties. terminal potentials above 2 MV. T he syst em is mainly aimed t o grow The beam hall has six beam lines. materials on templated subst rates and The beam line at -45º is used for RBS, PIXE compare change in their physical and ion channeling. Radiocarbon AMS is properties driven by anisotropy in carried out in t he -15º beam line. A substrate morphology. We have taken up general purpose scatt ering chamber a program to grow thin films and suitable for nuclear physics experiments naostructures having applications in solar using multiple detectors is available in the cell, spintronics, and nanophotonics. 0º line. This beam line also has the external beam port to perform PIXE experiments in at mosphere. T he 15º beam line is equipped with a raster scanner and is being used for ion implantation. There is a UHV chamber for surface science experiments in the 30º beam line. The 45º beam line has the micro beam facility. The types of experiments that are being carried out in the IBL are mainly ion beam modification and ion beam analysis. These include ion implantation, irradiation, channeling, Rutherford backscattering, and particle induced X- ray emission. The accelerator is also being used for radiocarbon dating by Ion Beam Laboratory Accelerator Mass Spectrometry (AMS) and for low energy nuclear physics The Ion Beam Laboratory houses experiments. The experimental facilities of the NEC 3 MV tandem Pelletron AMS and micro-beam provided by the IBL Accelerat or which is one of the major are unique in the country. The facilities for facilities used by researchers from around research in surface sciences include an the country. The accelerator provides ion ultra-high vacuum chamber on the beams of energies t ypically 1-15 MeV surface physics beam line at IBL which is Facilities 8 equipped with a t hin film deposit ion (from M/S NIMA , UK), a spin coat er, a facility, Auger spectroscopy and the low fume hood and mili-pore water purifier energy electron diffraction (LEED) units. systems are available.

HRTEM Laboratory Grazing Incidence X-ray Diffractometer (GIXRD) The HRTEM facility consists of two components: Jeol 2010 (UHR) TEM and D8 ADVANCE Grazing Incidence X- Associated Specimen Preparation system. Ray Diffractometer ( GI XRD) from M/S High-Resolution T ransmission Elect ron Bruker has been installed in the Cluster Microscopy (HRTEM) wit h an ultra-high and Nanostructure Lab. The equipment resolution pole-piece (URP22) working at can operate in grazing as well as powder 200 keV elect rons from LaB filament 6 XRD mode applications. The GIXRD assures a high quality lattice imaging with system has flexibility with possible a point-point to resolution of 0.19 nm. For combinations of x-ray sources, optics, in-sit u elemental charact erization and sample stages, and detectors. The system compositional analysis, an energy consist s of goniomet er, short t racks, dispersive system using Si(Li) det ector (INCA from Oxford, UK) is regularly used. vertical, 150 mm, 3 kW X-Ray generator, The facility carries out both planar and grazing incidence attachment for t hin cross-section TEM analysis of systems. For film analysis with parallel beam mirror for the specimen preparation, Grinder-cum- polisher, Ultra-Sonic Disc Cutt er, Dimple Grinder, Low Speed Diamond Wheel Saw, Wire Saw, T ripod Polisher, Precision I on Polishing System (PIPS) and Millipore water purifier system facilities are used. Recently, a low-temperature cooling sample stage holder (cooling with LN 2 – minimum temperat ure achievable is  110 K t o room temperature, Model 636 from M/S Gatan Inc.) and a dry pumping system have been installed.

Soft Condensed Matter Laboratory

The soft matter lab is used to grow polymers, nano-polymer composites, and Langmuir-Blodget t films. A n LB trough 9 Facilities bett er dat a quality, push plug Göbel a main analysis chamber and a sample Mirror 60 mm length, Cu radiation source preparation chamber, both under 10-11 with a set of slits for Goebel Mirror, flat LiF mbar vacuum conditions. The main monochromator, parallel beam chamber is equipped wit h a 125mm attachment (0.23°), fixed divergence slit hemispherical analyzer for angle- assembly including 2.5° Soller, short spacer integrat ed studies. A movable 65mm for push plug optics, set of plug in slits, Ni hemispherical analyzer, mounted on a 2- axis goniometer is also there in this K  filter for Cu radiation, standard chamber. These energy analyzers have a sample stage diffracted slit assembly typical resolution of around 15 meV. He I including 2.5° Soller, dynamic scintillation (21.2 eV) and He II (40.8 eV) lines from an detect or, NaI and ICDD data base for ultra-violet discharge lamp are used for phase identification. The D8 ADVANCE photo excitation. The analysis chamber is diffractometer has the ability to perform also equipped with a 4-axis sample a full range of applications for qualitative manipulator-cum cryostat, which can go and quantitative phase identification, down to 20K. Facility for performing Low under ambient or non-ambient Energy Electron Diffraction (LEED) is also conditions, crystal structure identification available in the analysis chamber. The of different samples, crystallite size sample preparation chamber has facilities determination, strain analysis, residual for scrap cleaning and evaporating stress analysis, and preferred orientation metal films. for established structures.

Multi Mode Scanning Probe Microscope ARUPS Laboratory Facility

T he A ngle Resolved Ult rav iolet At IOP we have a Multimode SPM Photoelectron Spectrometer (ARUPS) is (Scanning Probe Microscope) facility from equipped wit h facilities for doing both Veeco which is controlled via a angle integrated valence band NanoscopeIIIa controller with Quadrex. measurements as well as angle resolved SPM is being primarily ut ilized for the valence band measurements. This mu research in the fields of surface science met al UHV system is supplied by M/s and nanoscience for investigating surface Omicron NanoTechnology UK. In angle topography, nanost ructures, magnetic integrated UPS, we probe the valence structures, phase imaging, electrical force band electronic structure on imaging, STM, STS and electrochemical polycrystalline and thin film samples. The STM. The two primary techniques present angle resolved studies are possible on in our SPM are: Scanning tunneling single crystals. The UPS system consists of Microscope (STM), where the tunneling Facilities 10 current between t he probe and the sputtering. Sputtering technique can be sample surface is imaged, and Atomic utilized for doing depth profiling studies. Force Microscope (AFM), where the forces All the experiments are carried out under are imaged. AFM can further operate in ultra high vacuum (UHV) conditions at two modes viz. Contact mode and the vacuum of 1x10-10 Torr. Tapping mode. In addition the AFM can X-ray photons while impinging on be utilized to perform Lateral Force the sample surface produce Microscopy ( LFM), Force Modulat ion photoelectrons which can be utilized for Microscopy (FMM), Magnetic Force element al identification. The kinet ic Microscopy (MFM), Electric Force energy distribution of electrons phot o- Microscopy (EFM) and Phase Imaging. ejected by x-rays from a sample provides St udies in Liquid environment are also a map of t he discret e at omic levels, possible. specially the core levels of the constituent T he SPM consists of a family of atoms with in the material. Another very microscopy techniques where a sharp important aspect of XPS is the ability to probe (or tip) is scanned across a surface distinguish different chemical and the probe sample interaction/ environments of atoms; these appear in interactions are monitored. The XPS spectra as core level binding energy cantilever with the sharp tip is housed in shifts. The origin of chemical shifts arises t he cantilever holder. The t op of the from enhanced or reduced elect ronic cantilever is coated with a Au film. The screening of elect rons due t o charge laser beam falling on the cantilever is transfer. Small mean free pat hs of t he reflected into the photosensitive photo-ejected elect rons make XPS very detector. Any changes in the tip position surface sensitive (~1 nm). The technique are monit ored by t he detect or. T he of XPS is very useful in the studies of thin cantilever holder, laser beam and t he film st ructures, het erostruct ures, bulk photo-detector are located in the “AFM samples, and even for t he studies of head”. The sample is mount ed on t he biological samples. scanner which is at the “base” of AFM. MBE – VTSTM X-Ray Photoelectron Spectroscopy Setup The ultra clean surfaces are The present XPS system has a dual achieved at a vacuum condition better X-ray Anode (Mg/Al). The sample can be than 1x10-10 mbar pressures ( ultra high aligned by a manipulator. Photoelectrons vacuum, UHV conditions) and are energy analyzed by a hemispherical appropriate cleaning of surfaces. T he mirror analyzer. The system also has the facility for sample annealing and Ar ion Molecular Beam Epitaxy (MBE) – Variable 11 Facilities Temperature Scanning Tunneling carried out using indigenously built facility Microscope (VTSTM) system is a custom that consists of an 18.0 kW rotating anode designed unit procured from M/S Omicron (Mo) X-ray source from M/S Rikagu Co. GmBH, Germany. The facility consists of (Japan), a silicon single cryst al based three Knudsen cells, one e-beam monochromator, a 4-circle Huber evaporation source, sample manipulator goniometer for sample mounting and with direct and resistive heating manipulation, two types of detectors (NaI attachments, computer controlled and Si(Li)), a stand alone MCA and Reflection High Energy Electron associated nuclear electronics for Diffraction (RHEED) on-line analysis tool, counting and motor controls. The data quartz crystal thickness monitor, Residual acquisition and control is done with a Gas Analyzer (RGA), in-situ VTSTM computer which uses few add-on cards through UHV transfer rods. The facility is for the purposes with control software being used to study ultra clean surfaces programme under Linux operating reconstructions on Si(100), Si(110), Si(553) system. and Si( 557) syst ems, Ge, Au and A g X-ray reflectivity measurements are quant um dots deposited epitaxially on being use to study the roughness (with clean silicon surfaces, and epitaxially sub-angstrom resolut ion) at the surface grown thin films. In-sit u STM is used to study the atomic and electronic structure and interfaces and depth profiling of the nanostructures and surface (electron densities) many systems such as reconstructions. On-line RHEED is used to multilayers, LB films, Polymers, and thin films study the real time growth of epitaxial deposited under various conditions like e- films. beam evaporation, MBE deposition and spin coating methods. In X-ray standing XRF wave method, standing waves are generat ed in multilayers ( due t o long A small portable XRF facility based on period nature in self assembled fixed tube source ( 0.1 kW) and using a monolayers and multilayer systems) and energy dispersive syst em t o study t he used to det ermine t he atomic position toxic elements (high Z) in fly ash products across the surface and interfaces, such as and element al analysis in some wood Pt distribution in Pt/C multilayers. samples. T his facilit y is also used as high XRR and XSW resolution XRD to study strain profile across the interfaces in thin film structures and T he X-ray reflect iv it y and X-ray in epitaxially grown films. standing wave measurements are being Facilities 12 Micro-Raman Spectrometer can be studied for semiconductors, oxides

Micro Raman (Jobin Yoven U1000) spectrometer with double monochromator configuration and optimal resolution 0.1 cm-1 is available in Clust er and Nanostruct ure laboratory. Both solid and liquid samples can be used to perform Raman experiments. Spectra can be recorded t hrough a PC and analysis can be carried out using SPEX software. Lattice v ibrational modes of characteristic element s/ compounds/ and organic compounds. This instrument semiconduct ors can be studied. A part can identify trap states, band edges of from this, crystalline structure/orientation, semiconductors and also new organic compounds based on luminescence properties of materials.

UV-Vis-NIR Spectrophotometer

Shimadzu-make UV-3101PC spectrophotometer wit h PbS detect or (for longer wavelengths) is available at Cluster & Nanostructure Lab. The spect rophot omet er uses two sets of impurit y effects and crystalline size can gratings to cover a wide range of also be estimated. wav elengths (200-3200 nm). Both solid and liquid samples can be used for Fluorescence Spectrometer experiments. Optical properties viz. band Oriel-make fluorescence assembly gap estimation, quality of the crystal etc. comprising of double monochromators, can be studied. T he inst rument can excitation source (Hg-Xe lamp) and PMT operate in absorbance, transmission and (250-850 nm) det ect or is av ailable at diffused reflectance mode. Clust er & Nanost ruct ure Laborat ory. Temperat ure (down t o liquid-nit rogen FTIR Spectrometer temperat ure) effect on luminescence Cluster & Nanostructure Lab has a Nicolet FT-IR model Avtar-370 13 Facilities spectrometer. It consists of an Ever-Glow carried out using the LCR meter, HP make source capable of producing IR signal in LCR meter (model: 4284A) in Cluster & the spectral range of 200-4000 cm-1 while Nanostructure Lab. The LCR meter has glowing at 1200 to 1250°C. The modulator the capability to measure the consists of a CsI beam splitter and two conductance (L), capacitance (C), and metallic mirrors to generate the resist ance ( R) of t he semiconduct or interferogram. The transmitted IR is device over a wide range of frequencies detected by a DTGS-CsI detector with (20Hz to 1MHz) and test signal levels (5 mV 1cm-1 resolution. There are two modes of to 2Vrms, 50  A to 20 mArms). operat ion. I n case of t ransmit tance

Accelerator Mass Spectrometry

A ccelerator mass spectrometry mode, the sample is directly fixed in front (A MS) is a highly sensitive method for of IR source and the transmitted signal is analysis of isotopic compositions of allowed to the detector. In order to carry elements. Problems of isobaric out t he FTIR measurement of the solid, interferences from molecular species and opaque sample in grazing angle specular other background sources are effectively reflectance mode, SAGA NEXUS overcome in AMS, which uses a negative accessory has been provided. The ion source and subjects the ions to very instrument can identify organic high kinetic energy of several million compounds and inorganic oxides. elect ron v olt s, enabling det ect ion of extremely low isotopic abundances of the LCR Meter order of 10 -12 or less in milligram sized samples. AMS offers a convenient and The interfacial capacitance- fast way of analysis of radiocarbon (14C) v olt age ( C-V) measurement can be Facilities 14 in nat ural samples, which finds several during various stages of sample applications in earth sciences and preparation and graphite synthesis for 14C archaeology. Between 1998 and 2003, AMS targets. Knowledge of this isotopic the 3 MV Pelletron accelerator of IOP was fractionation is crucial to obtain accurate augmented for AMS measurements of 14C 14C dates. A reaction vessel has been and few ot her isot opes, using funds specially designed for extraction of CO2 available from various agencies of from dissolved inorganic carbon (from Government of India, and soon became seawater, groundwater or other sample 14 the first operat ional C A MS facility of types such as atmospheric CO2 trapped India. Being the only facility of its kind in in alkaline solution), which can minimize

India, the IOP AMS laboratory regularly contamination from CO2 in atmospheric provides 14C dates to several external air and isotopic fractionation. researchers from different organisations, cat ering t o t he 14C-dating needs in 1.3. COMPUTER FACILITIES diverse fields of archaeology and earth sciences. The computer facility in the Institute of Physics can be broadly divided Development of AMS analysis: into that for scientific computation, Local Area Network (LAN), access to internet Since IOP AMS laboratory began and automation of library and regular 14C analysis in 2005, significant administration. improvement s in analyt ical precisions There are about two hundred PCs were achieved, mainly through installed in the computer centre, automation of the MC-SNICS ion source laborat ories and offices of faculties, and adopting rigorous scrutiny of the raw scholars and administration in the A MS dat a. Measurement precision of Institute. The servers, the central network bett er than 0.5% has been achieved, hub, firewall, about t wenty PC’s and compared to 1% during the early phase net work print ers are inst alled in t he of the AMS project. computer centre. User’s data and general utilities are centrally stored in the 14 Sample preparation laboratory for C file server and are made available on the AMS: user’s deskt op PC’s by NFS over LAN. Twentyfour Xeon dual-CPU PC’s have Chemical sample pretreatment been configured in a cluster to execute methods for a variety of sample types for jobs in parallel implementing PVM. 14 AMS C analysis have been streamlined. Programs which require extensive Detailed and systematic study was done numerical computation are run in the 24- to evaluate isotopic fractionation of CO2 CPU PC clust er. Number of soft ware 15 Facilities packages such as Mathematica, Maple, ANUNET with the provision to connect Origin, IDL, Numerical Recipes are other units of DAE directly by VSAT link for av ailable for carrying out numerical voice and data communication. Seismic comput ations, symbolic calculations, monitoring equipment has been installed graphical analysis, modelling and in the Institute and seismic data are being simulation. GUPIX, XRUMP, and SIMNRA cont inuously transmit t ed t o Bhabha soft wares are available for analysis of Atomic Research Centre using ANUNET experimental data based on ion beam for analysis. Institute of Physics is a node analysis. For preparing scientific on t he Nat ional Knowledge Net work documents Latex is available in the PCs (NKN) and connectivity to NKN is being running under Linux. A number of network set up. printers are installed at different locations The administ rative work, such as for printing over LAN. accounting, personnel management , In the Institute, the gigabit stores management have been capacity LAN is implemented with three computerised. Several software levels of CISCO switches. Two core packages such as MSOffice, Wings 200 switches are configured in the redundant Net, Tally are in use. mode to load-balance the network In addition to the members of the traffic. Wirelss access points have been set Inst it ut e, the computer facilit y of t he up in the library, computer centre, main Institute is being used by researchers in building, auditorium, lecture hall and several universities and colleges in Odisha access to LAN by wireless is being for acdemic work. extended to other locations in the Institute. Access to LAN has been provided to the quarters of faculty in the 1.4. LIBRARY campus through ADSL system using telephone lines. The LAN is made secure by installation of firewall. Antispam The Library facility is available to the software is used to filter unwanted mails. members of the Institute, NISER as well as Antivirus software has been installed in members from other academic institu- the PCs running under MS XP/Vista tion. The Library holdings include 15,021 operating system in offices and books and 23,570 bound volumes of Jour- laboratories. nals, taking the total collection to 38,591. The internet service to Institute is Throughout the year the Library added provided at dedicated bandwidth of 16 271 books to its collection. The Library sub- Mbps. A second internet link at scribed to 139 Journals. The Library has dedicated bandwidth of 16mbps is being also acquired IOP (OJA), John Wiley two installed. Institute of Physics is a node on Online Journal Archives (OJA) perpetual Facilities 16 The Library also sends out articles as Digi- tal inter Library Loan ([email protected]). The Library is housed in a centrally air condit ioned building which is open round the clock for convenience of the users. The books and journals circulation system has become v ery effective with implement ation of bar-codes, online reservation and reminders through e-mail to its individual members. The Library cataloging is fully automated with Libsys 4 (Rel.6.0) software access right to the back files containing on Linux platform which is a fully all articles published since Volume 1 in int egrat ed mult i user package wit h electronic format and Springer Physics powerful search and query facilities. It and Astronomy (OJA), from Vol.1.This year supports activities like Acquisition, Library has added e-Books on Lecture Cataloguing, Circulation, Serial Control Notes in Mathematics and Lecture Notes etc. Searching of books and Journals can in Physics series from vol.1 with perpetual also be performed using the WEB-OPAC access right to back files and full archives in Library website. cont aining all art icles published since 2011. Besides this, the Library is a part of Facilit ies like photocopying have the Dept. of Atomic Energy consortium also been automated with user codes. with Elsevier Science from 2003 thus get- During the year a total no of 60,243 pages ting access to around 1500 journals elec- were photocopied for research purpose tronically. The Library assists users in obtain- and official work. The Library also takes ing articles from other Libraries in the coun- care of the Auditorium and Lecture hall try under resource sharing programme. facilities of the Institutes.

17

ACADEMIC 2 PROGRAMMES

2.1. Pre-Doctoral Programme 19

2.2. Doctoral Programme 20

2.3. Theses 20

2.4. SSVP – 2011 21 18 19 Academic Programmes 2.1. PRE-DOCTORAL PROGRAMME eligible to join research under the One of the most important superv ision of faculty members of t he objectives of the Institute has been to Inst itute, leading to the Ph.D. degree train and guide young scholars t o do awarded by Ut kal Univ ersity or Homi research in physics. For this, since 1975 the Bhabha National Institute (HBNI). Institute has a regular Pre-doctoral (post To recognize the talent, the M.Sc.) course work followed by the Institute has instit uted the Lalit Kumar Doctoral research programme. Panda Memorial Endowment Fellowship The pre-doctoral programme of the for the most outstanding pre-doctoral Institut e of Physics is a very important student . T he fellowship consist s of an academic programme because it is award of Rs.5,000/-, and a citation. designed to train the fresh students for conduct ing research activities. This is A total of around 200 JEST qualifiers aimed at imparting a broad based were called for interview. Of those who training in advanced physics and were select ed and finally joined t he research methodology. The course work Inst it ute, the following st udent s have is planned with the view that it should successfully completed the pre-doctoral course: help a student not only in doctoral research, but also enable him/her t o 1) Arpan Das become a good physics teacher 2) Subrata Kumar Biswal irrespective of whether or not he/she 3) Soumyabrata Chatterjee takes up doct oral research. Few years 4) Sumit Nandi back, the Institute joined the Joint Entrance Screening Test (JEST) for Details of the courses offered and conducting the written test for the Ph.D. course instructors are given below. programme in physics for students across t he count ry. T he final select ion of a Trimester – I student is made after an interview Quantum Mechanics : K. Kundu conduct ed at the I nst it ute. T he Pre- Mathematical Methods : G. Tripathy doctoral course runs from August to June Classical every year leading to a Diploma in Electrodynamics : A. M. Srivastava Advanced Physics awarded by the Theory of Experiments : T. Som I nst it ut e. T he Ut kal, Berhampur and Experiments : P. V. Satyam Sambalpur Universities have recognized the diploma as equivalent to their M.Phil Trimester – II degree. On completion of the Pre- Statistical Mechanics : A.M. Jayannavar doct oral programme, the students are Advanced Quantum Academic Programmes 20 Mechanics : P. Agrawal Trimester – III Field Theory : S. Mukherji Condensed Matter Numerical Methods : S. Varma Physics : B. R. Sekhar Experiment : P. V. Satyam Particle Physics : A. M. Sriv astava P. Agrawal Nuclear Physics : S.K. Patra

As a part of the course work, the pre-doctoral students also worked on projects in the last trimester at the end of which there were presentations. Some details of the projects undertaken are as given below.

Sl. Project Title Student Name Supervisor Name

1) Study of pattern formation due to ion bombardm ent and its applications Arpan Das T. Som 2) Nuclear Equation of State Subrata Kumar Biswal S. K. Patra 3) Renormanization Group Soumyabrata Chatterjee S. Mukherji 4) Polariz ation : A Berry Phase Approach Sumit Nandi S. M. Bhattacharjee

Arpan Das was adjudged the most outstanding pre-doctoral scholar and was given the L. K. Panda Memorial Fellowship.

2.2. DOCTORAL PROGRAMME 2.3. THESES The Institute has presently 34 The following scholars have been doctoral scholars working in different awarded Ph.D. degree by Homi Bhabha areas under the supervision of its faculty National Institute on the basis of thesis members. St arting from 2008, all the submitted. scholars are registered with Homi Bhabha Nabyendu Das : “Some aspects of National Institute (HBNI), a deemed-to- quant um phase t ransit ion in incipient ferroelect rics”, Supervisor : S. G. Mishra be Universit y wit hin DAE. It has now become mandatory to hold annual Sachin Jain : “Transport propert ies of review of the progress of each doctoral st rongly coupled gauge t heories from scholar. For this purpose, a review Holography”, Supervisor : A. Basu. committee is constituted to oversee the progress of each scholar. The reviews are Binata Panda : “Phenomenology wit h Magnet ized D-Branes”, Supervisor : held normally in the months of July-August S. Mukherji every year. 21 Academic Programmes 2.4. SSVP – 2011 a seminar on their given topics. Round trip The Summer Student’s Visiting train fare, accommodation on campus, Programme (SSVP) was held from May 2 and a monthly stipend of Rs. 4500/- were to June 15, 2011. T his year 8 st udents given to the candidates. participated in the program. Under this The motivation of the SSVP programme, each student worked under program is to expose the young students a faculty member of the Institute. At the to frontline research areas, especially the end, the students presented their work in work going on at the Institute.

22 23

3 RESEARCH

3.1. Theoretical Condensed Matter Physics 25

3.2. Theoretical High Energy Physics 31

3.3. Theoretical Nuclear Physics 35

3.4. High Energy Nuclear Physics 40

3.5. Quantum Computation 43

3.6. Experimental Condensed Matter Physics 44 24 25 Research 3.1. THEORETICAL CONDENSED MATTER PHYSICS

DNA Hysteresis any extensivity requirement in time makes this negative entropy an inevitable Replication and t ranscription are t wo consequence of quantum mechanics in important processes in living systems. To continuum. Our results encompass execute such processes, various proteins quantum critical points and first order work far away from equilibrium in a transitions in general dimensions. staggered way. Motivated by this, aspects of hysteresis during unzipping of P. Sadhukhan & S. M Bhat t acharjee DNA under a periodic drive are studied. The effect of confinement on stochastic A steady state phase diagram of a driven resonance in continuous bistable systems DNA is proposed which is experimentally verifiable. As a two state system, we also Stochastic resonance (SR) is a compare the results of DNA with that of phenomenon in which a feeble input an Ising magnet under an asymmetrical signal applied to a bistable potential gets variation of magnetic field. magnified at a particular noise strength. In this phenomenon noise plays a G. Mishra, P. Sadhukhan, S. M. constructive role as apposed to its being Bhat t acharjee & S. Kumar looked upon as unwanted. It has previously been shown that the average Entanglement entropy injected energy to the system is the best Two significant consequences of quantifier of SR. Using this quantifier, we quantum fluctuations are entanglement have shown that bistability is a necessary and criticality. Entangled states may not but not a sufficient condition for be crit ical but a critical stat e shows observing SR. It is observed in signatures of universality in entanglement. superharmonic (hard) potent ials, but is A surprising result found here is that the not observed in subharmonic (soft) ent anglement ent ropy may become potentials, even though the potential is arbit rarily large and negative near the bistable. However, in both soft and hard dissociation of a bound pair of quantum potentials, we have observed resonance particles. Although apparently counter- phenomenon as a function of the driving intuitive, it is shown to be consistent and frequency. Some subtleties in the essential for t he phase transit ion, by dynamics of the part icle in t he t wo mapping to a classical problem of DNA different types of potentials are analyzed melting. We associate the entanglement through the probability distribut ions of entropy t o a subext ensive part of t he work done on the system over a period. entropy of DNA bubbles, which is responsible for melting. The absence of Shubhashis Rana, Sourabh Lahiri, A. M. Jayannavar Research 26 Fluctuation theorems in presence of Stochastic Resonance in Periodic information gain and feedback Potentials

The fluctuation relations have received a The phenomenon of stochastic major attention in recent years, owing to resonance (SR) is known to occur mostly their validity for systems that are arbitrarily in bistable systems. However, the question away from equilibrium. We have of occurrence of SR in periodic potential generalized the fluctuation theorems in systems is not conclusively resolved. Our presence of feedback and work shows that the periodic potential measurements. Intermediate system indeed exhibit s SR in t he high measurement s on the syst em leads to frequency regime, where the linear informat ion gain that can be used to response t heory yields maximum extract more work from the system by frequency dependent mobility as a driving it using appropriate feedback, the function of noise strength. The existence syst em being in cont act with a single of two (and only two) distinct dynamical heat bath. This seems to be in states of trajectories in this moderately contradiction with second law if we do feebly-damped periodically driven noisy not take into account information and periodic potential system plays an feedback. Our treatment extends several important role in the occurrence of SR. classical theorems in t he presence of S. Saikia, A.M. Jayannavar, Mangal C. information and feedback. Some of these Mahat o include the Jarzynski Equality, total entropy production and Hatano-Sasa Scattering properties of PT -symmetric ident ity for transition between steady quantum systems states. We analyze the properties of scattering We have derived in t he presence of matrix for 1-D PT -symmet ric syst ems in information the extended quantum v iew of bot h bound and cont inuum fluct uation t heorems in open syst ems states. For continuum states, composed of coupled subsyst em and conservation properties are utilized to bat h. No assumpt ion is made on the extract physical conclusions. Asymptotic nature of environment and the strength states necessarily correspond to broken PT of system-bath coupling. However, it is -symmetry, leading to restricted boundary assumed that the measurement process conditions, some resembling the involves classical errors. We hav e also proposed PT CPA laser [S. Longhi, Phys. shown that the fluctuation relations are Rev. A 82 (2010) 031801(R); S. Longhi, robust agains intermediate projective Physics 3 (2010) 61], with inelastic measurements of any observable. scattering process. It is shown that transmission is possible, only if incidence Sourabh Lahiri, Shubhashis Rana, A. M. takes place from both sides of the system, Jayannavar 27 Research which is unique to a PT -symmetric dense Ge nanoislands within the domains. quant um mechanical syst em. T hese This contrasting patt ern format ion has systems require additional conditions for been explained via a reaction diffusion scattering and transfer matrices, model. indicating a unique algebraic structure. The S-matrix is found to be non-unitary, Anupam Roy , Tri lochan Bagart i , K. sat isfying a duality condit ion, hav ing Bhat t acharjee , K. Kundu , B.N. Dev known optical analogues [J. C. J. Surface Science : A reaction diffusion Paasschens, T. Sh. Misirpashaev, C. W. J. model of pattern formation in clustering of Beenakker, Phys. Rev. B 54 (1996) 11887]. adatoms on silicon surfaces Finally, a suggestive approach towards a physical PT -symmetric norm is made. We study a reaction diffusion model which describes the formation of patterns on Kumar Abhinav, P. Panigrahi and A. M. surfaces hav ing defect s. T hrough t his Jayannavar. model, the primary goal is to st udy the Patterns in Ge cluster growth on growth process of Ge on Si surface. We clean and oxidized Si(111) - (7X7) consider a two species reaction diffusion surfaces process where the reacting species are assumed to diffuse on the two Ge atoms have been deposited on dimensional surface with first order domain-patterned clean Si(111) - (7X7) interconversion reaction occurring at and Oxidized Si(111) - (7X7) surfaces. various defect sites which we call Clustering of Ge from the deposited Ge reaction centers. Two models of defects, adatoms on these two kinds of surfaces namely a ring defect and a point defect shows contrasting patterns. On the clean are considered separat ely. A s reaction Si surface, clustering predominantly centers are assumed to be strongly occurs on domain boundaries, which localized in space, the proposed reaction- include st ep edges on t wo sides. T his diffusion model is found t o be exact ly leaves small domains denuded. Ge solvable. We use Green’s function diffusion length has been estimated from method to study the dynamics of reaction the size of these denuded domains. For diffusion processes. Further we explore this large domains, addit ional clustering is model through Monte Carlo (MC) observ ed within t he domains. For t he simulations to study the growth processes oxidized Si surface, the pattern formation in t he presence of a large number of is in sharp contrast with that for the clean defects. The first passage time statistics Si surface. In this case the domain has been studied numerically. boundaries remain relatively empty and there is strong clustering within the Trilochan Bagart i, Anupam Roy, K. Kundu domains leading to t he format ion of and B. N. Dev Research 28 Transport of nutrients across cell We note that it is a very standard process membranes: in Chemistry, where one reaction which is not thermodynamically allowed is The understanding of coupled transports coupled to another thermodynamicaly of various nutrients, like glucose, fructose allowed chemical reaction with a very etc. and various ions, Na+, K+, Ca2+ et c. large free energy change so t hat t he across cell membranes of living biological overall process becomes systems is a very important and thermodynamically allowed. challenging problem in Physics and Chemistry. Usually ions like Na+ and We are modeling this coupled transport nutrients are present in high using an one-dimensional reaction- concentrations inside the cell. While a diffusion model. In our model reactions are large amount of nutrients is necessary for occurring on the surfaces of a cell the supply of energy required for various membrane. It is further assumed that that activities of a living system, the presence t he carrier enzyme can exist in t wo of Na+ in high concentration inside the conformations, E and E . T he cell is very det riment al for life. A s the 1 2 conformational change happens on the natural direction of movement of a surfaces. One form binds ions strongly, and species is from the higher t o the lower releases nutrients very efficiently. The other + inside the cell concentration regime, Na form is a strong receptor of the nutrients, can move out of the cell by diffusion and releases ions with high efficacy. It is through the membrane. As this process furt her assumed t hat enzyme bound does not require any energy, it is called a species can diffuse through the “passive transport”. On the contrary, as membrane, and can undergo the t ransport of nutrient s into the cell dissociation inside the membrane while occurs against the gradient of diffusing. T he diffusion process here is concentration, it requires energy. This assumed to be one-dimensional. type of transport is called “active transport”. The theoret ical analysis of this model is under progress. In order to facilitate the active transport of nutrients, many times, it is coupled to Kalyan Kundu the passive transport of ions through the Local electronic properties of atomic membrane. This coupling occurs through nanowires on a Cu-nitride surface carrier proteins or carrier enzymes. Because of the coupling the free energy Self-organized growth of surface of the total process becomes negative supported nano-st ructures like atomic and the transport of nutrients against the nanowires are likely to play important role concentration gradient becomes a in future elect ronic devices where the thermodynamically allowed process. 29 Research confined electrons show quantization structure of the Cu/Fe/Au-Cu3N-Cu(110) phenomena. T he format ion and t he system by giving a theoretical model. growt h behavior of epitaxial at omic For the theoretical understanding of the nanowires of 3d, 4d and 5d elements on STS spectra, we need to calculate the a corrugated Cu3N molecular network on local density of (electronic) states (LDOS) a Cu(110) surface have been reported. of a nano-wire or a collection of nano- A n element independent growth of wires. I n the tight binding Hamiltonian nanowires consisting of 5 atomic rows (TBH) formalism with each site of a nano- (~ 1 nm in widt h) running along [1-10] wire contributing a single Wannier orbital, direction on Cu N-Cu(110) surface was 3 LDOS at a given energy, E is given by observed . The charge density of Cu(110) 2    EEEC iinini )( surface can be dramatically altered by i terminating the surface with a (2 * 3) where n is the site index and i is the index copper nit ride ( Cu N) layer. A proper 3 for the eigenstate. E denotes the energy understanding of the local electronic i of the it h eigenstate. We note that in STS properties of the corrugated Cu N- 3 spectra we observe the local density of Cu( 110) molecular net work and t he density of states. atomic nanowires grown on this surface would be fundamentally important. We In our calculation we are using transfer report here the low temperature (4.7 K) matrix method. Though it is simple and scanning tunneling spectroscopy (LT-STS) elegant for one-dimensional problems, it studies of both the Cu3N layer and the Cu, Fe & Au atomic nanowires grown at can be used for complex structures. Our aim is to calculate  (E) for various types room temperature on this surface. n Const ant height and constant current of potential energy. In TBH formalism this tunneling spect roscopy measurements translates to various types of site-energies. Then the calculated LDOS is compared have been carried out on t he Cu 3N network and on the atomic nanowires. to experimentally obtained STS spectra of a nano-wire sample. When a complete or LT-STS studies on the Cu3N surface show v arious N 2p Cu 3d hybridized states a good matching is obtained, we get a which provide import ant informat ion plausible potential, though the solution about t he chemical composition of N- may not be unique. Conceptually our Cu(110) network. Tunneling spectroscopy approach is analogous t o the inv erse measurements performed on the atomic scattering problem in which the potential nanowires of Cu, Fe & Au show energy is found from the scattering data appearance of two pronounced using “Marchenko Equation”. unoccupied electronic states at ~ 1.8 eV and ~ 3.8 eV. These observations are to K. Bhat t acharjee and Kalyan Kundu be understood from t he elect ronic Research 30 Bidirectional transport in a multispecies lane switching processes. We study TASEP model correlated lane switching mechanism for particles so that switching may occur We analyse the int erplay between the with finite probability only when oppositely switching dynamics of individual particles directed species meet on the same (vesicles) and their collective movement channel. The system is analyzed for closed on the cellular filament. When switching ring with conserved total particle is much faster t han translocat ion, t he number. For asymmetric particle steady state density and current profiles exchange between the lanes, the system of the particles are homogeneous in the exhibits unique polarization phenomenon bulk and are well described by a Mean- with segregation of oppositely directed Field (MF) theory, as determined by species bet ween the t wo lanes. For comparison to a Monte Carlo simulation. symmet ric exchange rate of particles In this limit, we can map this model to the between the lanes, the system remains exact ly solvable Part ially A symmet ric unpolarized, with equal particle density Exclusion process ( PASEP) model. Away on both the lanes in the t hermodynamic from this fast switching regime, the MF limit of large syst em size. T he features theory fails, although the av erage bulk observed for this model will have density profile still remains homogeneous. ramifications for biofilament based We study the steady state behaviour as intracellular transport, wherein cellular a function of the ratio of the translocation cargo are t ransport ed by opposit ely and net switching rates, Q , and find a direct ed particles on multiple filament unique first-order phase transit ion at a tracks. finite Q associated with a discontinuous change of the bulk density. When t he S. Muhuri switching rate is decreased further (keeping t ranslocation rate fixed), t he Instrinsic oscillations of polymerizing system approaches a jammed phase antiparallel microtubules in a motor bath with a net current that tends to zero as J 1/Q . We numerically const ruct t he We analyze the dynamics of overlapping phase diagram for finite Q . antiparallel treadmilling microtubules in the presence of crosslinking processive S. Muhuri motor proteins that counterbalance an external force. We show that coupling the Phase segregation and transport in force-dependent velocity of motors and a two species multi-lane system the kinetics of motor exchange wit h a bath in the presence of treadmilling leads We st udy a two channel driven lattice generically t o oscillat ory behavior. I n gas model with oppositely directed addit ion, we show t hat coupling the species moving on two parallel lanes with polymerization kinet ics to the external 31 Research force through the kinetics of the Associated production of a KK-graviton crosslinking mot ors can st abilize t he with a Higgs boson via gluon fusion at the LHC oscillatory instability into finite-amplitude nonlinear oscillations and may lead to In order to solve the hierarchy problem, other scenarios, including bistability. several extra-dimensional models have received considerable at tent ion. We S. Muhuri have considered a process where a Higgs boson is produced in association with a 3.2. THEORETICAL HIGH ENERGY PHYSICS KK-graviton ( GKK) at the LHC. At t he Gauge/Gravity Duality: leading order, this process occurs through

the gluon fusion mechanism  hGgg KK For charged black hole, within the grand via a quark loop. We compute the cross canonical ensemble, the decay rate from section and examine some features of this thermal AdS to the black hole at a xed process in the ADD model.We find that high t emperature increases with the the quark in the loop does not decouple chemical potential. We check that this in the large quark-mass limit just as in the case of gg  h process. We compute the feature is well captured by a phenom- cross section of this process for the case enological mat rix model expected to of the RS model also. We examine t he describe its strongly coupled dual. This feasibility of this process being observed comparison is made by explicitly at the LHC. constructing the kink and bounce solutions around the de-connement P. Agrawal, Ambresh Shivaji and t ransit ion and evaluating t he mat rix Subhadip Mit ra model eective potential on the solutions. Production of a KK-graviton and a vector B. Chandrasekhar, Sudi pt a Mukherji, boson in ADD model via gluon fusion Anurag Sahay, Swarnendu Sarkar In the models with large extra-dimensions, Holographic Cosmology we examine the production of a vector boson ( /Z ) in association with the We consider general black hole solutions Kaluza-Klein (KK) modes of the graviton in ve-dimensional space-time in the via gluon fusion. At the leading order, the presence of a negative cosmological process takes place through quark-loop constant. We study cosmological box and triangle diagrams and it is evolution of a time-like hypersurface via ultraviolate finite. We report the results for holography including the eect of shear t he LHC. We also discuss the issues of viscosity. anomaly and decoupling of heavy quarks in the amplitude. S. Banerjee, S. Bhowmick, S. Mukherji P. Agrawal, Ambresh Shivaji and V. Ravindran Research 32 Four-lepton Signature of the Higgs Boson Feynman diagram approach. We have with tau-jet tagging developed our own numerical code, based on the method of Oldenborgh and We have examined the feasibility Vermaseren, t o perform t he one-loop identifying a Higgs boson using a few tensor reduction. multi-lepton signatures. These signatures can be obtained when the Higgs boson P. Agrawal, Ambresh Shivaji is produced v ia pp  ttHX and t hen Single top quark production in association decays into a tau-lepton pair. It can give with Higgs boson and anomalous vector rise to ‘isolated four-lepton’ signatures. In bosons couplings the case of pp  ttHX , t he multilepton signat ures include t au-leptons, which We have considered the processes need to be identified as tau-jets. We find pp  tqhX ,tbhX , tWhX ,tqbhX at the LHC to the tau-jet tagging efficiency and its miss- inv est igat e the anomalous tbW,WWh , tagging rate. It appears that, for a Higgs and tth couplings. We find t hat t hese boson of the mass about 125 GeV, the couplings can enhance the cross-sections significantly. Using these processes, one process pp  ttHX gives useful can put more stringent bounds on the multilepton signatures. anomalous couplings.

P. Agrawal, Somnat h Bandopadhyay P. Agrawal, Subhadip Mitra and Ambresh Shivaji Production of Two Vector Bosons in Association with a jet via gluon fusion at Relativistic Heavy-Ion Collisions Effect of LHC quarks on the formation and evolution of Z(3) walls and strings in relativistic heavy- We have computed the cross-sections ion collisions and distributions for the production of two vector bosons and a jet via the process We inv estigat e the effects of explicit  ' gVVgg . Here V or V ' could be a  ,W breaking of Z(3) symmet ry due to t he or Z 0 vector bosons. These processes will presence of dynamical quarks on t he produce large number of events at the formation and evolution of Z(3) walls and LHC. They can provide a way to test the associated QGP strings within Polyakov standard model. These processes are also loop model. We carry out numerical backgrounds to Higgs boson, scalar simulations of the first order quark-hadron particles in supersymmetric theories, and phase transition via bubble nucleation techni-particles. In the standard model (which may be appropriate, for example, these processes occur at one loop at finite baryon chemical potential) in the through pentagon and box diagrams. context of relativistic heavy-ion collision The calculation is based on conventional experiments. Using appropriate shifting of 33 Research the order parameter in the Polyakov loop We also discuss its implicat ions for t he effect ive potent ial, we calculate t he early universe. bubble profiles using bounce technique, for the true vacuum as well as for the A. At reya, A. Sarkar, and A. M. Srivast ava metastable Z(3) vacua, and estimate the associated nucleation probabilities. These Analyzing flow anisotropies with excursion different bubbles are then nucleated and sets in relativistic heavy-ion collisions evolved and result ing formation and dynamics of Z(3) walls and QGP strings is We show that flow anisotropies in studied. We discuss various implications of relativist ic heav y-ion collisions can be the existence of these Z(3) interfaces and analyzed using a certain technique of the QGP strings, especially in view of the shape analysis of excursion sets recently effects of the explicit breaking of the Z(3) proposed by us for CMBR fluctuations to symmet ry on t he format ion and investigate anisotropic expansion history dynamical evolution of these objects. of the universe. The technique analyzes shapes (sizes) of patches above (below) U. Gupta, R.K. Mohapatra, A. M. cert ain threshold v alue for transverse Srivast ava, and V.K. Tiwari energy/particle number ( the excursion sets) as a function of the azimuthal angle Spontaneous CP violation in quark and rapidity. Modeling flow by imparting scattering from QCD Z3 interfaces extra anisot ropic momentum t o t he momentum distribution of particles from In this paper, we explore the possibility of HIJING, we compare the resulting spontaneous CP violation in the distribut ions for excursion sets at two scattering of quarks and anti-quarks from different azimuthal angles. Angles with QCD Z3 domain walls. The CP violation maximum difference in the two here arises from the nontrivial profile of the distributions identify the event plane, and the magnitude of difference in the two background gauge field A0 )( bet ween different Z3 vacua. We calculate the distributions relates to the magnitude of momentum anisotropy, i.e. elliptic flow. spat ial v ariation of A0 across the Z( 3) interface from the profile of the Polyakov  R.K. Mohapat ra, P.S. Saumia, and A. M. loop L(x) for the Z(3) interface and Srivast ava calculate the reflect ion of quarks and antiquarks using the Dirac equation. This Quench induced oscillations and flow spontaneous CP violation has interesting anisotropies in relativistic heavy-ion collisions consequences for the relativistic heavy- ion collision experiments, such as baryon We model the initial confinement- enhancement at high . It also acts as PT deconfinement transition in relativist ic a source of additional J/ suppression. heavy-ion collisions as a quench in view Research 34 of expected rapid thermalization to a Relativistic hydrodynamics Simulation in relativistic heavy-ion collisions QGP state. The phase transition is studied using the Polyakov loop model, with the We are working on developing codes for initial field (in the confining phase) relativist ic hydrodynamics simulation of covering a small neighborhood of t he flow in relativistic heavy-ion collisions. This confining vacuum . During the l0 is being done using SHASTA algorithm. quench l rolls down in different directions from t he t op of the central hill in t he P.S. Saumia and A. M. Srivast ava effective potential of l when explicit Z(3) Dual superconductor model of symmetry breaking effects (arising from Hadronization dynamical quark effects) are small. In such a situation we find vacuum bubble like Quark confinement can be modeled configurations arising during the quench. using the picture of QCD vacuum as dual T his first order transit ion like behav ior chromomagnetic superconductor. Using occurs even though there is no this picture we are working on simulating met ast able v acuum separat ed by a the process of hadronization by studying barrier from t he true vacuum for the dynamics of magnetic monopole- parameter values used. When the initial antimonopoles pairs during a field configurat ion rolls down roughly superconducting phase transition. Simulation of global U(1) symmetry along the same direction (due to large breaking has been simulated in 3-D explicit symmetry breaking) then we do resulting in a coarsening string network. not find such bubble-like configurations. Gauge fields are being incorporated to However, in this case we find huge represent Abelian Higgs model. oscillations of with large length scales. l Subsequently, magnetic monopole- We find that the different dynamics of the antimonopole pairs will be incorporated quench case (with large oscillations), and representing quark degrees of freedom. the equilibrium case where field evolves more slowly and uniformly, can lead to P. Bagachi, P.S. Saumia, and A. M. Srivast ava large differences in growth of flow anisotropies. These results point out that Probing the anisotropic expansion history the dynamics of the order parameter field of the universe with cosmic microwave (the Polyakov loop condensate) may play background an important role in determining We propose a simple technique to detect observables such as flow anisotropies. any anisotropic expansion stage in the history of the universe starting from the R.K. Mohapat ra and A. M. Srivast ava inflationary stage to the surface of last scattering from the CMBR data. We use 35 Research the property that any anisotropic String winding studies in extra compact expansion in the universe would deform dimensions t he shapes of t he primordial densit y We are cont inuing to develop a setup perturbations and this deformation can with rotating cylinder of optical fiber (of be detected in a shape analysis of 50 micron diameter) where a thin film of superhorizon fluctuations in CMBR. Using nematic liquid crystal on the cylinder will this analysis we obtain the constraint on be heated and cooled. Resulting string any previous anisotropic expansion of the network will be analyzed to determine universe to be less than about 35 %. the universal winding number per R.K. Mohapatra, P.S. Saumia, and correlation length. New digital camera A. M. Srivast ava with low light sensitivity, high resolution, and relatively fast frame speed is being Baryon inhomogeneities from CP violating procured, along with special objectives Z(3) walls in the Universe for hot stage and wit h large working We explore t he consequences of CP space. v iolat ing scat t ering of quarks from a network of Z(3) walls in the early Universe. Ajit M. Srivast ava We show that it can lead to large concentrations of baryons and 3.3. THEORETICAL NUCLEAR PHYSICS antibaryons separately. This will lead to Study of nuclear fission for neutron-rich strong constraints from nucleosynthesis. It nuclei can also lead to novel models of electroweak baryogenesis. The structural properties of the recently predict ed thermally fissile neutron-rich A. At reya, A. Sarkar, and A. M. Srivast ava Uranium and Thorium isotopes are studied Liquid Crystal Experiments using the relativistic mean field formalism. Cross-polarizer studies of vortex system: The investigation of the new phenomena dual string model for coarsening of multifragmentation fission is analysed. dynamics In addition to the fission properties, the total reaction cross-section of these nuclei We investigate the coarsening dynamics are evaluated taking 6,11 Li and 16,24 O as of dark brushes for a 2-D vortex system in projectiles. The possible use of nuclear fuel nematic liquid crystal phase. Its similarity in an accelerator based reactor is with the coarsening dynamics of st ring discussed which may be the substitution defects in a 3-D system are explored. of 233,235 U and 239 Pu for nuclear fuel in near Ajit M. Srivast ava future.

R. N. Panda, M.Bhuyan, S.K. Pat ra Research 36 Half-lives of proton emitters using relativistic isotope (largest binding energy per mean field theory nucleon) is found to be the 288 117 nucleus. Also, the Q -values and the mean-life T he prot on radioact iv ity lifet imes of  times T for the -decay chains of 293 117 proton emitters from the ground and the   isomeric states are calculated using the and 294 117 are calculated, supporting the microscopic M3Y + Ex and R3Y + Ex magic numbers at N=172 and/ or 184. (proposed) nucleon-nucleus interaction The ground state and first intrinsic excited potentials. These interaction potent ials st ate of superheavy nuclei with Z=120 are obtained by single folding the and N=160-204 are inv est igat ed using densities of the daughter nuclei both non-relativistic Skyrme-Hartree-Fock supplemented by a zero-range (SHF) and the axially deformed Relativistic pseudopotential. The quantum- Mean Field (RMF) formalisms. We employ mechanical-tunneling probability is a simple BCS pairing approach for calculated within the WKB calculating the energy contribution from approximation. The calculated results are pairing interaction. The results for isotopic found to be in good agreement with the chain of binding energy, quadrupole experimental data for both the M3Y and deformat ion parameter, t wo neutron R3Y interactions. separation energies and some other observ ables are compared wit h t he B. B. Sahu, S. K. Agarwalla and S. K. Pat ra, FRDM and some recent macroscopic- Phys. Rev. C84, 054604 (2011); BirBikram Singh, M. Bhuyan, S. K. Pat ra and Raj K. microscopic calculat ions. We predict Gupt a. superdeformed structures in the ground state for almost all the isotopes. Structures of exotic and superheavy nuclei Considering t he possibilit y of magic neutron number, two different mode of We have calculated the binding energy, -decay chains 292 120 and 304 120 are also root-mean-square radius and quadrupole  studied within these frameworks. The Q - deformation parameter for the recently  values and the half-life T  for these two synthesized superheavy element Z=117, 1/2 different mode of decay chains are using t he axially deformed relat ivistic compared with FRDM and recent mean field (RMF) model. The calculation macroscopic-microscopic calculations. is extended to various isotopes of Z=117 The calculation is ext ended for the - element, starting from A=286 till A=310.  decay chains of 292 120 and 304 120 from We predict almost spherical structures in their exited state configuration to the ground state for almost all the respective configuration, which predicts isotopes. A shape transition appears at long half-life T  (sec.). about A=292 from a prolate to an oblate 1/2 We have calculated the binding energy shape structure of Z=117 nucleus in our in different st ates like spherical prolate mean field approach. The most stable 37 Research and oblat e shape, root -mean-square input in the calculations. We find radius and quadrupole deformat ion reasonable reaction cross-section with parameter 2 density distribution of the both the densities. However with a better nucleons in different states like spherical inspection of the results, it is noticed that prolate and oblate shape for the recently t he result s obt ained with relat iv ist ic synt hesised Z 105= t o 118 nuclei in densities are more closure to the different laboratories, along with t hese experimental data than the nuclei Z=120 was also taken for study, nonrelativistic Skyrme densities. using non-relativistic (SHF) and relativistic

(RMF-NL3* model. Life-time T and  - M. K. Sharma, M. S. Mehta and S. K. Patra decay energy Q also calculated and we  High Spin States (Nuclear Spectroscopy) compared our data with FRDM model. For study of the ’Island of inversion’ in the Deformed Hart ree-Fock and A ngular full nuclear landscape, we have t aken Momentum Projection gives a complete only these three regions Z=17-24, Z=37-40, descripti on of the structure of deformed Z=60-64. We calculated the ground state nuclei in various regions of mass. We have binding energy, quadrupole deformation applied t his fo rmalism t o st udy t he parameter , root mean square charge, 2 st ructure of 152 Ba and 148 Xe and other neutron, proton and matter radii and two neighboring exotic nu clei. For 152 Ba a rich neutron separation energy, using band structure is predicted including K relativistic mean field model with NL3 and Shape Isomers at 10 MeV or less of paramet er set. We copared our data excitation energy. This study is extended with finite range droplet model (FRDM) to Ce, Nd, Sm, Gd, Dy, Er, Yb, Hf and and infinite nuclear matter (INM) model. neighbouring nuclei covering a range of neutron numbers. M. Bhuyan, S. K. Pat ra and Raj K. Gupt a, We also calculat ed t he st ruct ure of M. Shakeb, S. K. Singh, M. Ikram, S. neutron rich even-even 164150 Sm nuclei Mohapat ro are inv est igat ed in t he framework of deformed Hartree-Fock, Skyrme Hartree- Nuclear reaction Fock+BCS and relativ ist ic mean field formalisms. We analyzed the bulk as well We calculate the nuclear reaction cross- as microscopic properties of these nuclei section for some of the ultra neutron-rich to investigate the proposed ‘island of nuclei in the lighter mass region of the st ability’ near the neutron drip-line for periodic chart which are recently N = 100, Z  62 . measured. The well known Glauber formalism is used taking deformed B. B. Sahu, S. K. Singh, M. Bhuyan, S. K. relativistic and nonrelativistic densities as Ghorui, Z. Naik, S. K. Pat ra and C. R. Praharaj Research 38 Equation of state in Infinite Nuclear Matter Simple effective interaction

Recently, the isospin and density The study of nuclear properties from finite dependence of the nuclear symmet ry nucleus to highly isospin asymmetric energy E , is the current interest for its sym dense nuclear matter in a given model is implications not only in the above a promising area of current nuclear problem as well as in astrophysics. Mean research. The relativistic and non- while the novel phenomena like relativistic microscopic models, such as, formation of superheavy nuclei in Dirac-Brueckner-Hart ree-Fock ( DBHF), astrophysical system also improved by Brueckner-Hartree-Fock (BHF) and using a proper value E , which also front sym calculations using realistic interaction are learning about the island of st ability at considered to be standard calculations superheavy regions. Here, we introduce for reference in t he regime of nuclear a new term in the Lagragian, which is the matter (NM), but ab init io extension to combined effect of isoscalar-vector and finite nucleus calculation in these models isovector-vector field with coupling is still in rudimentary stage. To overcome constant (  ). The effect of newly added v this quest, we defined a simple effective term to the E , K and all other co- sym 0 interaction (SEI) and apply this to infinite efficient are studied. The quest in EOS is nuclear matt er as well as finite nuclei the stiffness of the E wit h respect to sym study. For the same, the ab init io baryonic density may solve by introducing ext enation of the SEI having Gaussian the adove defined coupling constant  v form for f (r) t o finit e nuclei has been without affection all other observables performed in the quasilocal Density quantatively in the infinite nuclear matter Functional Theory (DFT) model. We note and finite nuclei. It is worthy to mention here that all the nine parameters that, without this additional constant, adjusted initially for infinite nuclear matter one cannot overcome the hindrance. As and used these paramet ers for finit e a results the modofied Lagrangian with nuclei along with W (spin-orbit strength) the new coupling term used here for the 0 are adjusted to produced the bulk study of nuclear matter properties. From properties and single particle spectra of the Lagrangian, we derived the energy double closed nuclei. We have done this and pressure density along with all meson ab init io calculation for infinite nuclear field equat ions. All the equations are matter and finite nuclei. solved self-consistent by numerical methods. M. Bhuyan, T. R. Rout ray and S.K. Pat ra

M. Bhuyan, S. K. Singh, S. K. Pat ra, and P. Panda 39 Research Nuclear Astrophysics: quantization of the charged particles. We construct the intermediate mixed phase Recent observation of pulsar PSR J1614- region, using Glendenning construction 2230 with mass about 2 solar mass had and enforcing Gibbs criterion. We assume indeed posed a severe constraint on the densit y dependent bag pressure and equations of state (EOS) of matter magnetic field. The magnetic field describing stars under extreme strength increases going from the surface condit ions. Compact stars can have to the center of the star. We find that hadronic matter, neutron stars (NSs), or the magnet ic field softens t he EOS of can have exot ic stat es of mat ter like bot h the matter phases. The effect of strange quark matter, strange stars (SSs), magnetic field is insignificant unless the or color superconducting mat ter. Stars field strength is above 1014 G. A varying also can have a quark core surrounded magnetic field, with surface field strength by hadronic matter, known as hybrid stars of 1014 G and the central field strength of (HSs). The HS is likely to have a mixed the order of 1017G has significant effect phase region in between. Observational on both the stiffness and the mixed phase results also regime of the EOS. We have also studied suggest huge surface magnetic field in the mass-radius relationship for such type cert ain NSs called magnetars. NSs can of mixed HS, and calculate their reach the mass limit s set by PSR J1614- maximum mass, and compared them 2230. But stars having hyperons or quark with the recent observation of PSR J1614- stars (QSs) having boson condensat es, 2230. HS wit h a mixed phase region having softer EOS can barely reach such cannot reach the mass limit set by PSR limits and are ruled out. QS with pure J1614-2230 unless we assume a low strange mat ter, can barely have such density dependent bag constant. For huge masses unless the effect of strong such a case t he mixed phase region is coupling constant or colour truncated and their is a jump in the EOS superconductivity are taken into curve going from the mixed phase to the account. quark phase. T he maximum mass of a We hav e studied the effect of st rong mixed hybrid st ar obt ained wit h such magnetic field on t he EOSs of matt er mixed phase region is 1.98 Modt. under extreme condition. We also have The conversion of NS to SS/HS is a highly studied the hadron-quark phase energetic process, as in such conversion transition in the interiors of NS giving rise processes the EOS of matter changes, to hybrid stars (HS) with strong magnetic leading to a change in the mass of the field. The hadronic matter EOS is star. Special theory of relativity gives mass described by GM1 parameter set. For the in terms of energy, such conversion leads quark phase we use the simple MIT bag to huge energy release, of the order of model. We have included the effect of 1053 ergs. We have studied the energy strong magnetic fields leading to Landau released by such conversion, with stars Research 40 having mass close to that suggested by that a color-octet fermion and a PSR J1614-2230. We studied the energy hyperchargeless weak-triplet fermionic released by normal pulsars and also by dark matt er are the missing part icles magnetars. As already st ated the final needed to complete its MSSM-equivalent state of the star may be a SS or a HS, we degrees of freedom. When t hese are have calculated the energy release for included the model automatically the different final states. We have found predicts the nonsupersymmet ric grand that the energy released in the unification with a scale identical to the conversion of NS to SS is greater than the minimal supersymmetric standard model/ conversion of NS to HS. Huge magnetic grand unified theory scale. We also find a fields modifies the EOS of the matter and two-step breaking model with Pati-Salam thereby affects the conversion process, intermediate symmetry where the dark whose effect can be seen in the matter and a low-mass color-octet scalar difference of the amount of the energy or the fermion are signaled by grand released by normal NS and magnetars. unification. The proton-lifetime The energy released by magnetars is less predictions are found to be accessible to than that of normal pulsars. The amount ongoing or planned searches in a number of energy released by such conv ersion of models. We discuss grand unified origin can only be compared t o t he energy of the light fermionic triplet dark matter, observed in the gamma ray bursts (GRBs). the color-octet fermion, and their Calculating such energies we have tried phenomenology. We plan to to extend to see whether we can have any our model SO(10) to find nat ural Higgs observable signatures which can point to boson mass scales for observable matter the difference between NS and and antimatter oscillations. magnetars. M. K. Parida and P. K. Sahu R. Mallick and P. K. Sahu 3.4. HIGH ENERGY NUCLEAR SO(10) model at LHC PHYSICS We show how gauge coupling unification is successfully implemented through non- Heavy-ion collisions: supersymmetric grand unified theory, The strongly decaying particles having $SO(10)\times Gf~Gf=S4, SO3_f, SU3_f, using low-scale flavor symmetric model of the lifetime (ô) of the order of 10-23 sec are called resonances. I t carries a set of t ype SU 2_L X U 1_ Y X SU 3_ C X S4 recent ly proposed by Hagedorn, Lindner, and quantum numbers (spin, isospin, etc) like Mohapatra, while assigning matter-parity normal particles. I t differs from regular discrete symmetry for the dark matt er particles in that its mass is smeared and stability. For gauge coupling unification in has a width. This is based on uncertainty the single-step breaking case, we show principle bet ween t ime and energy 41 Research which implies shorter the life time, t he and calculate invariant mass spectra and wider is the uncertainty in mass. In heavy Pt spectra for corrected (efficiency and ion collisions, during the expansion of the acceptance) data and the elliptic for Ë*. fireball, a stage is reached when the inelast ic interactions among hadrons For ALICE Collaboration : cease and this is known as the chemical freeze-out. Kinetic freeze-out is reached At FAIR energies the charm sector when there is no further elastic becomes accessible and measurements interactions among the produced of charm will be performed for the first hadrons. As the resonances have v ery time in heavy ion collisions. Particles are short life times (<“ few fm/c), a fraction of produced in the early stage of the them decay inside the medium before nucleus-nucleus collision. But the effect of the thermal freeze-out. In such a case the the QGP formed in the region of hadronic decay daughter part icles go production is to make the particle(J/psi) through a period of elastic interactions unbound. When this happens the system with the hadrons in the medium. These dissociates into a separate ‘c’ quark and int eractions alt er the momenta of the a antiquark ‘c ‘ in the plasma. The ‘c’ daughter particles. However, after the quark subsequently hadronize by chemical freeze-out, there can be combining wit h light quarks or light pseudo-inelastic interactions among the antiquarks to emerge as open charm hadrons in the medium, resulting in an mesons ( D). T he effect ive mass of D increase in the resonance population. mesons are expected to be modified in Therefore, both the resonance dense matter which leads to a change regeneration and primary production of the relative abundance of (unscattered resonances) contribute to charmonium and D-mesons. The the total yield of resonance signals anomalous suppression of charmonium detected. Measurement of the due to the screening effect and resonance yields can therefore serve as a enhancement of D mesons allow probing tool to probe the time evolution of the the onset of QGP formation. We study the system (from thermal to kinetic freeze-out) Jpsi supression and D meson production and to study the final state interactions at low t emperature and high baryon in the hadronic medium. density theoretically and compare our calculation with dat a av ailable from We are working on Ë* (1520), which is an CBM experiments later. Also we study the excited state of Ë (1115.5), has PDG mass kinematics, flow ansd v iscous effect in 1519.5 ±1.0 MeV and width (Ã) 15.6 ± 1.0 heavy ion collision at high baryon density MeV. I t s quark struct ure is (uds) and and low temperature for these particles. lifetime ~12.6 fm. It has different decay modes with different branching ratios. We R.C. Baral, P. K. Sahu and plan to study different systematic studies D. P. Mahapat ra Research 42 For CBM Collaboration: potential µB , strangeness chemical potential µS , and strangeness suppression The Relativistic Heavy Ion Collider (RHIC) factor S . The grand-canonical ensemble at Brookhaven National Laboratory (BNL) (GCE) approach is used to fit the is primarily designed to study the experimental particle ratios and to properties of a new state of matter, called obtain the chemical freeze-out the Quark Gluon Plasma (QGP). The Beam parameters. The extracted Tch increases Energy Scan ( BES) program at RHIC is with increasing energy and also shows a devoted to study the QCD phase slight increase as we go from peripheral diagram which involves searching for the to central collisions for all energies. The µB possible QCD phase boundary and the increases with decreasing energy. This is possible QCD critical point . T he STA R because of large baryon stopping at mid- experiment has collected data for rapidity at low energies. The µB also shows Au+Au collisions at sN N = 7.7, 11.5 and 39 a slight increase from peripheral to central GeV in the year 2010. The chemical and collisions for these energies. kinetic freeze-out pa- rameters can be extracted from the experimentally N. R. Panda, P. K. Sahu and measured yields of ident ified hadrons D. P. Mahapat ra within the framework of thermodynamical models. At the STAR Collaboration: chemical freeze-out, no further inelastic collisions between particles occur and the One of the most important experimental particle composition is fixed. When elastic findings at RHIC has been the evidence collisions between particles also cease, the of coalescence of quarks as the kinetic freeze-out takes place. T hese dominating mechanism for hadronization freeze-out parameters provide from a deconfined plasma at the information about the system at different intermediate transverse momentum (1.5 stages of the expansion. We hav e < pT < 5 GeV/c). However, it is st udied the centrality dependence of experimentally difficult to study how local freeze-out parameters for Au+Au correlations and energy/entropy play a collisions at mid-rapidity for sN N = 7.7, 11.5, role in coalescence since t he partonic and 39 GeV. T he chemical freeze-out constituents are not directly observable. parameters are obtained by comparing In relativistic heavy-ion collisions, light the measured particle ratios to those from nuclei and anti-nuclei are formed through the statistical thermal model (THERMUS) coalescence of nucleons and anti- calculations. This model assumes thermal nucleons. T he advantage of nucleons and chemical equilibrium. T he main fit over the partonic coalescence paramet ers are chemical freeze-out phenomena is that both the nuclei and parameter Tch , baryonic chemical the constituent nucleon space- 43 Research momentum distributions are measurable transverse momentum (< pT >) and the quantities in heavy-ion collisions. By average v2 and compared those with studying the elliptic flow of nuclei and Tsallis Blast-Wave (TBW) model predictions. comparing to those of their constituents Both v2 and < pT > trends are consistent (nucleons), we will have a better with expectations from TBW model fit. understanding of coalescence process for S. Das, C. Jena, D. P. Mahapat ra and hadronization. P. K. Sahu We have studied v2 of d(d) and 3 H e(3 H e) in Au+Au collisions at sN N = 200 GeV 3.5. QUANTUM COMPUTATION and 39 GeV. The Au+Au 200 GeV and 39 GeV dat a were t aken with t he STA R Quantum States, Entanglement and detector at RHIC in the year 2007 and Closed Timelike Curves 2010, respectively. The v2 values for light nuclei are scaled to the number of We investigate the nature of quantum constituent quarks (NCQ) of their st at es ( densit y operat ors) and constituent nucleons and are consistent entanglement in quantum theory with wit h NCQ scaled v 2 for baryons and closed timelike curves. One of t he key mesons. T he dominance of part onic concepts in the standard quantum collectivity in t he transverse expansion theory is that given any mixed state we dynamics in these collisions naturally can always purify it in an enlarged Hilbert produces such a consistent picture. The space by bringing an ancillary system. The v2 of light nuclei are in good agreement purified state does not depend on the with the dynamical coalescence model stat e of any ext raneous syst em wit h calculation in Au+Au collisions at sN N = which the mixed state is going to interact 200 GeV. In this model, the probability for and on the physical interaction. Here, we producing a cluster of nucleons (d, t and prove that it is not possible to purify a 3 H e) is determined by the overlap of its mixed state that traverses a closed time Wigner phase-space density wit h the like curve (CTC) and allowed to interact nucleon phase-space distributions at in a consist ent way wit h a causalit y freeze-out . T o det ermine t he Wigner phase-space densities of the d, t and 3 H respecting (CR) quantum system. Thus, in e, we take their hadron wave functions general for arbitrary interactions t o be t hose of a spherical harmonic between the CR and the CTC systems oscillator. The coordinate and there is no universal Church of the larger momentum space distributions of hadrons Hilbert space for mixed states with CTC. at freeze-out are obtained from A MPT This shows that in quantum theory with model calculation. We have also studied CTCs there can exist proper and improper the mass dependence of average mixtures. Also, we suggest what kind of Research 44 ent angled st ates are allowed in the are not revealed by conventional presence of CTCs. We argue that t he measures of entanglement, but can be nature of entanglement can be different seen by physical quantities such as in the presence of such exotic objects. We discord. We show that such objects probe also discuss how the no-hiding theorem in not only entanglement, i.e., non-local the presence of CTCs may allow quantum quantumness but also local quantumness. That is why such measures information pop-up. are non-zero when there is no ent anglement. We suggest that there P. Agrawal, Arun Pati and Indranil does not exist non-local quantum Chakrabarty correlations that go beyond what is know as entanglement. CTC assisted PR box type correlation can lead to signaling P. Agrawal, Arun Pati and Indranil Chakrabart y It has been shown that there exist non- local correlations that respect no- 3.6. EXPERIMENTAL CONDENSED signalling criterion, but violate Bell-type MATTER PHYSICS inequalities more than quantum- mechanical correlations. Such During this period, 2011 – 12, major work superquantum correlations were has been carried out in understanding the introduced as the Popescu-Rohrlich (PR) interfaces and their active role various box. This box has two binary inputs and interesting structural evaluations. two binary out puts. These boxes have extensive study on the formation of Au-Si been generalized t o t hree input s and and Au-Ge nano structures under output s. We consider such non-local different t hermal annealing conditions boxes with two/three inputs and t wo/ achieved by varying parameters such as, three outputs. We show that these pressure, film thickness, substrate, superquantum correlations can lead to presence or absence of native oxide on signaling when at least one of the input the substrate, temperature etc. bit has access to a word line along a closed time-like curve. Mr. Rat h’s and Mr. J. K. Dash.

P. Agrawal, Arun Pat i, Tanumoy Pramanik Oriented growth of Gold Nanostructures and Indranil Chakrabart y under Low Vacuum and High Temperature conditions Discord and Quantumness Various thicknesses of gold thin films were There has been speculat ion that there deposited using MBE as well as thermal may exist quantum correlations that go evaporation technique. Difference in the beyond entanglement. These correlations t emperat ure dependent behav ior of 45 Research gold nanostructures on Si (100) surfaces gold nanostructures at high temperature in presence and absence of native oxide (H” 975º C) was observed. The shape of layer were studied in-sit u using a hot- the oriented structures can be tuned with stage holder (GAT A N, Model 628). I n a variable initial thickness of gold films: Au case of MBE samples, formation of highly films with lower thickness (d”5 nm) lead oriented square /rectangular shape nano to spherical particles. Increasing the film structures were observed at high thickness result in the formation of temperatures (500°C). St rain relaxation oriented and faceted gold structures. The and substrate symmetry plays a major in effects of native oxide layer on the alignment of these Au-Si morphology, orientations of the structures nanostructures. In case of samples with were studied in detail. Interfacial oxide nat ive oxide layer, formation of bigger layer, low vacuum and high temperature sized rectangular structures was annealing conditions are found t o be observed at higher temperatures (850ºC). necessary to grow oriented gold At these high temperatures, desorption structures. We also showed that oriented of the gold silicide followed the symmetry microst ructures cannot be fabricat ed of t he subst rate. Native oxide at the without oxide layer at the interface (using interface was found to act like a barrier MBE method). These gold structures can for the inter-diffusion phenomena. A t be transferred by simple scratching these higher temperatures, due to method. desorption of native oxide present at the interface, rectangular structures were Vacuum Dependence and Surface formed. We observed desorption of gold Morphology variations: and /or gold silicide structures and We extended our understanding of the formation of symmetric hole like structures influence of vacuum conditions upon the in some cases. Using different thicknesses formation of nanostructures in presence of gold films in both cases ( wit h and and absence of oxide layer. A ~2 nm Au wit hout nat ive oxide layer), size of the deposited on SiOx/Si by thermal nanostructures could be controlled. evaporation method was annealed at A. Rat h, J. K. Dash, R. R. Juluri, A. Ghosh, high temperat ure (850ºC) under both A. Bhukta , A. Rosenauer, Marcos high vacuum (HV) and low vacuum (LV) Schoewalt er and P.V. Sat yam conditions. In HV, gold silicide rectangles were observed following t he four-fold Thickness Dependence on the shape symmetry of the substrate due to control of oriented Au structures: selective thermal decomposition of In thickness dependent st udies (5, 11.7 native oxide layer, where as in LV does not show any such formation. This has been and 50 nm Au on SiOx /Si) at low vacuum (H”10–2 mbar) annealing did not reveal explained as due to low vacuum which any alloy formation, rather well oriented ensures that the rate of formation(re- Research 46 deposition) of oxide over takes over the was further deposited on the annealed rate of oxide decomposition in a relatively sample while the substrate was kept at oxygen rich environment compared to H”500°C. Well ordered Au-Ge high vacuum conditions. T o study t he nanostructures where Au and Ge residing effect of vacuum conditions on MBE side by side (lobe-lobe structures) were grown samples (without oxide layer), 2nm formed. I n our systematic studies, we Au/Si(100) sample was annealed at 500°C show that, gold-silicide nano alloy in three different vacuum conditions: (i) formation at the substrate (Si) surface is LV external furnace (H”10-2 mbar), (ii) ultra necessary for forming phase separated high vacuum (UHV at H”10-10 mbar) Au-Ge bilobed nanostructures. The chamber (MBE chamber), (iii) HV(H”10-7 morphology of such bi-lobed struct ures mbar). A lt hough well aligned nano has been t uned by varying t hickness rectangles were formed in both HV and (amount) of the Ge, substrate LV, corner rounding is more prominent in temperature and sequence of material LV. Furthermore in UHV, random structures deposition. It has been studied that the were formed having sharp corners. In all bonding between Au and Ge is unstable the above t hree cases, samples were which leads to the phase separation. Our exposed to air before annealing. To study results also indicate that Si-Ge bonding is the effect of surface oxide, in-sit u more preferred t o Au - Ge bond. This annealing inside UHV-MBE chamber was observ at ion of phase separat ion at done without exposing to air. Well aligned nanoscale would be very useful for proper rectangles with sharp corners (no corner understanding of gold contacts on Si Ge rounding) were formed. based devices.

A. Rat h, J. K. Dash, R. R. Juluri, A. Ghosh, To study this nanoscale phase separation A. Bhukt a , and P.V. Sat yam and its effect on the formation bilobed Nano scale phase separation in Au-Ge structures, we replaced the Si(100) with system on ultra clean Si(100) surfaces: Ge(100) substrate. For this study, H”2.0 nm thick Au films were grown by MBE. Nearly One of the utilization of such Au-Si square shaped Aux Ge1-x nano structures nanostructures as a catalyst is to study were formed aft er UHV annealing at the controlled formation of lobe-lobe (bi- temperature H”500°C. A H”2 nm Ge film lobed) Au-Ge nanostructures under UHV was further deposited on the annealed conditions on clean Si(100) surfaces. For sample while the substrate was kept at this study, H”2.0 nm thick Au films were H”500°C. Well distributed Au-Ge grown by molecular beam epitaxy (MBE). nanostructures with Au on the top of the

Nearly square shaped Au x Si1-x nano pedestal Ge were formed. It is very structures of average length H” 48 nm interesting to notice that no Au-Ge were formed aft er UHV annealing at bilobed structures were formed like temperature H”500°C. A H”2 nm Ge film previous case. To study the temperature 47 Research dependence, similar Ge deposition was is of great potential for future high-speed performed at the substrate temperature devices, due to advantages like of 600°C. The height of the pedestal Ge enhanced carrier mobilities and smaller increased with temperature. The bandgap, and hence is att ract ing an detailed study of the Au-Ge interface has increasing int erest in fundamental and been done in this work. applied research. A large number of experimental works were devot ed t o A. Rat h, J. K. Dash, R. R. Juluri, Marco investigate the formation of Si-Ge islands Schowalt er , Knut Mueller, A. Rosenauer and P.V. Sat yam on clean silicon subst rat es of v arious orientat ions due to its use as a model Ge growth on High Index Si surfaces: Si (5 system t o understand complex issues 5 12), Si (5 5 7) and Si (5 5 3): related to hetero-epitaxy and technological application. Application of The shape evolution of Si-Ge Ge/Si may be found in silicon-based nanost rucrures on various high index optoelectronics. Due to the indirect band silicon surfaces, grown by Molecular Beam gap, Si devices are not well suited for Epitaxial (MBE) under ultra-high vacuum optoelectronic applications. New devices (UHV) would be reported. The employing Ge/Si epit axial layers are morphological dynamics hav e been expected to overcome this restriction. analyzed in different t hermodynamic Si1"x Gex alloys show smaller fundamental growth conditions and substrate bandgaps compared to Si, because of orientations. A comparative study of the larger lattice constant and altered lattice Si-Ge structures on the ultraclean constituent s and, due to t he acquired reconstructed high index surfaces, such tetragonal symmetry in pseudomorphic as, Si(5 5 12), Si(5 5 7) and Si(5 5 3), has layers. St rained Si-Ge t echnology has been presented in terms of shape been recognized as a promising solution transformat ions wit h varying substrate for high-performance devices, because of t emperat ure, growt h cov erage and it s cost -eûect iveness and high carrier mode of annealing condition. The mobility. To maximize the transport anisotropic surface reconstruction propert ies, it is required t o tailor the inherent t o high-index silicon surfaces defect morphology as well as the surface makes them potentially significant morphology properly. Composition substrates for electronic device grading is one of t he well-est ablished fabrication. These surfaces, consisting of techniques to prevent dislocations from periodic steps and terraces, have reaching the surface. attracted renewed attention as In the past, the growth of Ge templates for the controlled growt h of nanostructures on low index silicon aligned one dimensional (1D) substrat es (such as Si(100), Si(111)) has nanostruct ures. The implementation of been studied extensively. However, less Ge nanostructures into Si based devices attention has been paid to Ge growth on Research 48 high-index Si substrates. Hence, the study varying thickness from 3 to 12 ML were of self-assembly of Ge on high-index silicon grown under ultrahigh vacuum surfaces would be an important field of conditions on a Si(5 5 12) substrate while research in obtaining various t ypes of keeping the substrate at a temperature aligned nanost ruct ures t hat may be of 600°C. T he substrat e heat ing was useful in optoelectronic devices. Among achieved by two methods: (i) by heating the high index silicon surfaces oriented a filament under the substrate (radiative bet ween (001) and ( 111), Si( 5 5 12) heating, RH) and ( ii) by passing direct exhibits 1D symmetry with a ( 110 ) mirror current t hrough the samples in three plane. Si(5 5 12) is oriented 30.5° away directions (perpendicular, parallel and at from (001) towards (111) with one- 45° to the step direction). The dimensional periodicity over a large unit temperature was monitored with an infra- cell . Si(5 5 7) has a vicinal angle of 9.45° red pyrometer calibrated with a from ( 111) t owards ( 112 ). T he highly thermocouple attached to the sample corrugat ed t riple step structure of the holder. We found irregular, more Si(5 5 7) surface is easier to detect than spherical-like island structures under RH other long-range surface reconstructions. conditions. The shape transformat ions A Si(5 5 3) surface, which is tilted at -12.27° hav e been found under DC heat ing from the (111) plane towards the (0 0 1) conditions and for Ge deposition more plane, is one of the important high index than 8 ML thick. The longer sides of the Si surfaces. In all the above vicinal t rapezoid st ruct ures are found t o be surfaces, the step edges are parallel to the along irrespect ive of t he DC current 110  direction. direction. Also the absence of such a J. K. Dash, A. Rat h, T. Bagart i, R. R. Juluri, shape transformation in the case of Ge A. Ghosh, A. Bhukt a , and P.V. Sat yam deposition on Si(111) substrates has been shown. Scanning transmission electron Universality in Shape Evolution of Si1-xGex Structures on High Index Silicon Surfaces microscopy ( ST EM) measurement s suggested the mixing of Ge and Si . This In the growth of Ge nanostructures and has been confirmed with a quantitative microstructures on ultraclean, estimation of the intermixing using reconstructed high index Si(5 5 12) Rutherford backscattering spectrometry surfaces show that self-assembled growth (RBS) measurements. A part of the thesis at opt imum thickness of the overlayer work is devoted to the theoretical leads to interesting shape modeling which complements the shape transformations, namely from evolution mechanism. T he theoret ical nanoparticle to trapezoidal structures, at model includes 2D kinematic Monte Carlo higher thickness values. The (kMC) simulation, which is a reconstruction has been confirmed with phenomenological model that was in-sit u reflection high energy elect ron intended to explain the phenomena of diffract ion (RHEED). Thin films of Ge of shape transition observed in the 49 Research experiments. In our model, we introduce and the width decreasing to an anisotropy through binding energies of asymptotic value of _25 nm. This produces different types of bonds and the long nanowires of nearly constant width. dependence of surface barrier on t he The endotaxial nanostructures grow into direction of hopping. A deviation the Si substrat e wit h a small extension paramet er ( e) was introduced in the above the surface. surface barrier term ( ED ) to t ake the effect anisotropic diffusion , as one of the J. C. Mahat o, Debolina Das, R. R. Juluri, plausible mechanism. R. Bat abyal, Anupam Roy, P. V. Sat yam, We growt h and shape evolut ion and and B. N. Dev, APL 2012. compositional analysis of Si1-x Ge x struct ures on t hree high index silicon Optimization of the preparation of GaN- surfaces Si(5 5 12), Si(5 5 7) and Si( 5 5 3). based specim ens with low-energy ion milling for (S)TEM A comparative analysis of these structures has been done under different We report on opt imization of electron growth conditions varying growth transparent GaN based specimens for coverages, substrate temperature and transmission electron microscopy ( TEM) mode of heating. A phenomenological and scanning T EM ( ST EM) st udies by t heoret ical modeling with 2D kinetic combining focused ion beam thinning Monte Carlo Simulation compliments the and low-energy (d”500 eV) Ar-ion milling. experimental findings. Energy dependent ion milling effects on J. K. Dash, A. Rat h, T. Bagart i, R. R. Juluri, GaN based structures are inv estigated A. Ghosh, A. Bhukt a , and P.V. Sat yam and the quality of ion milled samples is compared with that of specimens Nanodot to nanowire: A strain-driven prepared by wet chemical et ching. shape transition in self-organized Defects formed during ion milling lead to endotaxial CoSi2 on Si(100) amorphizat ion of t he specimen. T he experimental results are compared with A phenomenon of st rain-driv en shape Monte-Carlo simulat ions using the SRIM transition in the growth of nanoscale self- (stopping and range of ions in mat ter) organized endot axial CoSi2 islands on software. Specimen thickness was Si(100) substrates has been worked out. deduced from high-angle annular dark Nanodots of CoSi2 grow in the square field ST EM images by normalizat ion of shape following the four fold symmetry of measured intensities with respect to the the Si(100) substrate, up to a critical size intensity of the scanning electron probe of 67_67 nm2, where a shape transition and comparison with multislice takes place. Larger islands grow as simulations in the frozen lattice approach. nanowires with ever increasing length The results show that the thickness of the Research 50 amorphous surface layer can be did not find any indication for formation successfully reduced below 1 nm by low of In rich regions due to electron beam energy ion milling, leading to a irradiation, which is reported in literature homogeneous image contrast in TEM and to occur for the parallel illumination mode. STEM, so that good conditions for Image simulation of an In0.15Ga0.85N quantitative analysis can be achieved. layer that was elast ically relaxed with For an ion energy of 400 eV the thickness empirical Stillinger– Weber potentials did measurements resulted in an et ching not reveal significant impact of lat tice rate of about 6–8 nm/min, Micron 2012. plane bending on STEM images as well as on the evaluated In concentration Thorst en Mehrt ens, St ephanie Bley, P. V. profiles for specimen thicknesses of 5, 15 Sat yam, Andreas Rosenauer and 50nm. Image simulation of an abrupt Composition mapping in InGaN by interface between GaN and scanning transmission electron In0.15Ga0.85N for specimen thicknesses microscopy up t o 200 nm showed t hat art ificial blurring of interfaces is significantly smaller We suggest a method for chemical than expected from a simple geometrical mapping t hat is based on scanning model that is based on the beam transmission electron microscopy (STEM) convergence only. As an application of imaging with a high-angle annular dark the method, we give evidence for the field ( HA A DF) det ect or. T he analysis existence of In rich regions in an InGaN met hod uses a comparison of intensity layer which shows signatures of quantum normalized with respect to the incident dot emission in micro-photoluminescence electron beam with intensity calculated spectroscopy experiments ,tramicroscopy employing the frozen lattice 2012, approximation. This procedure is validated with an In0.07Ga0.93N layer A. Rosenauer, T. Mehrt ensa, K. Muller, K. wit h homogeneous In concent ration, Gries, M. Schowalt er, P. V. Sat yam, S. where the STEM results were compared with energy filtered imaging, strain state Bley, C. Tessarek, D. Hommel, K. Sebald, analysis and energy dispersiv e X-ray M. Seyfried, J. Gut owski, A. Avramescu, analysis. Good agreement was obtained, K. Engl and S. Lut gen, if the frozen lattice simulations took into 2+ account static atomic displacement s, MeV Au ions induced surface patterning caused by the different covalent radii of in silica In and Ga atoms. Using a sample with higher In concentrat ion and seriesof 32 This paper reports the formation of self- images taken within 42 min scan time, we organised surface morphological features 51 Research on silica irradiated with MeV energy gold graphite (HOPG) are not well understood ions. Amorphous silica substrates were and might be governed by the carrier irradiat ed with 1.8 MeV gold ions at dynamics near their Fermi energy (E F ). normal incidence at room temperature The near E F electronic structure on both to various doses in the range of 5 × 1016 the occupied and the unoccupied sides ions/cm2 t o 2 × 1017 ions/cm2. T he are important for a consolidated formation of a periodic surface pattern underst anding of t he physics behind with a wavelength of 1.35 mm was these properties. A lthough, there have observed at an irradiation dose of 1 × 1017 been many experimental studies earlier 2 ions/cm . T he observ ation of surface on the electronic structure of the segregation of gold at around the same occupied states of graphite, recent works dose suggests possible role of surface hav e shown many new results owing stresses caused by t he incorporation of mainly t o the improved experimental met al at oms in the format ion of the techniques. On the other hand, only a observed periodic surface morphology, few studies have been reported recently Applied Surface Science 2012, on the electronic structure of the unoccupied states. We made a P. Sant hana Raman, K.G.M. Nair, M. comparative study of the near fermi-level Kamruddin, A.K. Tyagi, A. Rat h, P.V. electronic structure of single crystal HOPG. Sat yam, B.K. Panigrahi, V. Ravichandran Angle resolved photoelectron Structure of the occupied and un- spectroscopy and angle resolved inverse occupied bands of Graphite - an ARPES photoelectron spectroscopy have been study used to probe the occupied and unoccupied electronic states, Recent research act ivities on the t wo respectively. The band dispersions dimensional material graphene has given showed by single crystal graphite along an impetus to the reinvestigation of some its G-K and G-M symmetry directions were of the exotic and fundamentally found to be in agreement with important physical properties of carbon calculated band structure of graphite. based materials. Like graphene, which The p bands of single crystal graphite were shows a peculiar low energy elect ronic found to have a splitting of 0:5 eV at the spectrum due to its sublattice structure, K-point. We also observe the presence of graphite also has a linear dispersion near a quasiparticle peak below E F at the K the H point along with its quadratic band point at low temperature which indicates near the K point of its Brillouin zone. Many a strong electron—phonon coupling in physical properties like the transport and graphite. In HOPG, the M and K points like magnet ic behaviours, in single cryst al features were found to be present in the graphite and in highly oriented pyrolytic Research 52 same radial direction due to the hole-doped mat erials. Further, earlier superposition of the G-M and G-K studies have shown t he exist ence of directions. Results from our angle resolved dynamic ferromagnetic spin correlations inverse photoemission spectroscopy at high temperatures and present the dispersion of the conduction antiferromagnetic correlations at low band states, part icularly t he lower pn temperatures in these electron-doped band. We have also found the presence systems. Recent studies on thin film and of some non-dispersive features in both nanoparticle forms of different the valence and the conduction bands. CMRcompositions have highlighted the role of dimensionalit y in such phase B. R. Sekhar coexist ence. T he coexist ing magnet ic phases in these materials are the focus of Electronic structure of Electron Doped CMR new models proposed t o explain the Materials met al-insulator transitions in doped 3d metal oxide compounds. We have Strong int erplay of charge, spin, and studied t he t emperature-dependent lattice degrees of freedom of electrons changes in the near E electronic form the basis of t he phenomena of F structure of the electron-doped, phase colossal magnetoresistance (CMR) shown separat ed colossal magnet oresistance by manganites. T o a large extent, the (CMR) compound, Ca Pr MnO using traditional models employing the charge- 0.86 0.14 3 phot oemission and x-ray absorpt ion spin coupling, have been able to explain studies. At low temperatures, this t he CMR in many of t he hole-doped compound shows a high e g elect ron compositions (R 1â x A x MnO 3 with x  1/ densit y near t he E though the 2, where R is a trivalent lanthanide and A F compound is insulating. Photoemission is a divalent alkaline-earth element). But, measurements further showed a much less is known about the electron- t emperat ure dependence of t he e doped versions of these materials with x g elect ron occupation and localizat ion  1. The charge, orbital and spin ordering while the complementary results of XAS add complexit y to the ferromagnet ic showed corresponding changes in the double exchange and the number of unoccupied states. Our results superexchange interact ions in t hese indicate a transfer of charges from the t materials. These Mn(IV) rich compositions 2g states to the e band, probably due to a exhibit marked differences from their g decrease in the crystal field splitting in the Mn(III) rich counterparts in their ferromagnet ic met allic ( FMM) phase electronic and magnetic properties. For following the struct ural changes of the example, t heir electrical conductivity MnO octahedra at low temperatures. behavior in the range of 150 - 300 K was 6 We have interpreted our results from a found to be distinctly different from the FMM-antiferromagnetic insulating (AFMI) 53 Research phase separation scenario. an enhanced oxygen 2p character due to the weakening of the Fe 3d - O 2p - Bi B. R. Sekhar 6p hybridization strength. The valence bands of compositions wit h t he R3c Electronic structure of Bi1-xPbxFeO3 structure were found to be qualitatively Multiferroic materials have been similar to the LSDA calculations except for at tracting a lot of interest due to t he their estimates of the band width and complex spin coupling between their co- band gap. Reasons for this could be the existing magnetic and ferroelectric (FE) higher value of the effective Coulomb orders. Technologically, these materials interaction (U eff ). These results could be are import ant for the construction of of importance to the underst anding of mult ifunct ional devices in t he field of the electronelectron correlation in spintronics and sensors. Most studied multiferroic materials. among them, the BiFeO 3 , has it s B. R. Sekhar antiferromagnetic (AFM) and FE orders originating from the 6s 2 lone pair Energetic Ion Based Materials Science : electrons of the off-center located Bi ions Ion beam induced surface and the partially filled d orbitals of the Fe nanostructuring of semiconductors ions respectively. The large spontaneous Self-organization during low-to-medium- FE polarization shown by this material was energy ion induced erosion of initially thought to be due to the semiconductor surfaces has started heteroepitaxial const raint on its crystal showing its efficacy as a cost-effective structure. But, recent measurements on technique for generation of large area thin films and single crystals have shown nanostructured semiconductor surfaces. that this FE polarization arises from the I t is a single step processing route t o structural modifications or the different FE create sub-hundred nm features at a paths. These studies have further shown much faster rate compared to the that the FE polarization is intrinsic to the conventional lithographic techniques. BiFeO and depends st rongly on the 3 Recently, several reports have topology of the oxygen octahedra in its demonst rated the format ion of ripples structure. We have studied the valence and nanodots on various semiconductor band elect ronic st ruct ure of t he Bi 1- surfaces by ion sputtering. It is possible to Pb FeO (x = 0.02 - 0.15) system by using x x 3 tune the size of the dots or ripple X-ray and ultra-v iolet phot oelectron wavelength and height by varying the spectroscopy. As this system undergoes a ion sputtering parameters such as ion- R3c t o cubic phase transition with Pb energy, -fluence, -flux, -incident angle, doping, the near Fermi level states show and t he sample t emperature. We are Research 54 working on creating self-organized terms of use of patterned substrates for nanostructures on semiconductor growth of functional materials. surfaces (e.g. Si, Ge, InP, GaAs, and GaN) In another study, we made an attempt by using intermediate ion energy (50-60 to achieve room temperature keV) and to underst and the underlying ferromagnetism in GaN:Cr system which was predicted by a recent theoretical physics in terms of various experimental study. In this process, we implanted Cr- parameters and the existing theories. ions in GaN at elevated temperature and S.K. Garg, T. Basu, J.R. Mohant y, M. Kumar, at various fluences. Based on a detailed Shiv Poojan Pat el, V. Venugopal, O.P. analysis of the magnetometry data, we Sinha, S.R. Tripat hy, S.R. Bhat t acharyya, demonstrate that the magnetic D. Kanjilal, and T. Som interactions between Cr moments in GaN are antiferromagnetic (AFM). Increasing Thin film / nanoscale magnetism the Cr fractional concentration up to We are studying ion beam induced 0.35, we observe t hat st rong nearest interface modification of magnetic cation neighbor AFM coupling results in multilayer thin films to tune their magnetic the reduction of the effective moment properties. Co-Pt and Co-Cr-Pt systems per Cr atom. T he uncompensated Cr are used as magnet ic recording media moments exhibit paramagnetic behavior and ion irradiation is known to provide a pert urbed by A FM int eractions in an unique way t o tailor t heir magnet ic anisotropic crystal field. We discuss the properties with a high spatial selectivity. observ ed changes in magnet ic and In case of magnetic multilayers, using keV structural properties induced by thermal ion irradiation, one can lead to controlled annealing in terms of defect annealing mixing (by varying the ion fluence) across and Cr agglomeration. Our results support the interfaces. Such interface t he view t hat the high-t emperat ure modification leads to bring changes in ferromagnetism often observed in their magnetic and structural properties. transition-metal doped GaN may be non- We have performed molecular dynamics intrinsic. simulation to understand the processes J.K. Tripat hi, Shiv Poojan Patel, T. Basu, M. responsible for interface mixing which Kumar, M.O. Liedke, A. Gupt a, L.M.C. results such changes in struct ural and Pereira, K. Temst , A. Vant omme, and magnet ic propert ies of the mult ilayer T. Som samples. We are also working on growth of Growth and characterization of thin films for photovoltaic applications nanostructured Co films on rippled substrates to study morphological We are studying growth of oxide thin films, anisotropy driven magnetic anisotropy. viz. In O :SnO (ITO) and ZnO:Al O (AZO) This is a totally new area of research in 2 3 2 2 3 on glass, silicon, and polymer substrates 55 Research which are useful for photovoltaic Recrystallizat ion was realized by micro- applications. The main object ive is to Raman, cross-sectional transmission study three-dimensional growth of these electron microscopy (XTEM), and selected materials by glancing angle deposition area diffraction pattern studies. We have technique which is an integral part of the attributed these results to the sputtering set-up. We are studying their consequence of higher electronic energy structural, optical, and electronic loss t o nuclear energy loss ( Se/Sn) ratio. properties. It is observed that room More experiments are underway to temperature (RT) grown ITO films, address the individual role of nuclear and deposited by pulsed DC sputtering, show elect ronic energy loss in case of SHI a very high transmittance and low induced recrystallization process at resistance upon annealing in air. We are temperatures much lower compared to in t he process of comparing t he film the solid phase epit axial growth of the properties grown by RF magnetron respective system. sputtering. Detail electrical- and photo- conductivity studies are also underway. Recently, we st art ed working on SHI On the other hand, RT grown AZO films induced recrystallization study of also show very low resistance and high t hermally grown SiO2 on Si. Usually, optical transmittance. Photo- recryst allizat ion of SiO2 is a complex conductivity studies provide the relevant process albeit with t he help of SHI we information on defect states and t he hav e achieved recrystallizat ion of t hin nature of doping of Al in these films. SiO2 layers at low processing temperatures. M. Kumar, T. Basu,, S. Nandy, R. Siva Kumar, S. Chat t erjee, C. Sanjeevi Raja, T. Som, T. Basu, S.K. Garg, P.K. Sahoo, A. P. Ayyub, and T. Som Benyagoub, M. T oulemonde, and D. Kanjilal Ion beam induced epitaxial crystallization of materials Patterning of Oxide semiconductor Single Ion beam induced epitaxial Crystal Surfaces by Ion irradiation crystallization of amorphous layers offers a few advantages: i) low temperature Nanodots have been fabricated on rutile recrystallization, ii) high spatial selectivity, TiO 2 (110) single crystals using A r ion and iii) dynamic defect annealing. For beam. I on beam sput t ering creat es quite some time, we are working on swift oxygen vacancies, leading to a 45 nm heavy ion induced recrystallization of self thick Ti rich layer, on the surface. Post- ion-induced amorphized germanium sput tering, rutile T iO also exhibit s a layers at different temperatures. decrease in the inter planar2 separation Research 56 along [110] direction. Additionally, understood from cell adhesion and blueshift in the E g Raman mode, proliferation tests. We are also representing the vibrations of oxygen investigating the effect of plasma atoms along c-axis, is also observed. Both treatment and UV irradiation on these results suggest the development of semiconductor surfaces with the a compressive stress along c-axis upon motivation of making them sputtering. Enhancement in intensity of biocompatible.

A 1g raman mode also indicates modification in Ti-O vibrational influence. S. Varma, N. Gomat hi (IIST, Trivendrum), S. Majumder, Indrani Mishra Raman Scattering Investigations display formation of strains in the system. Interaction of Plasmid DNA and Lambda DNA with Mica surfaces and S. Varma, Subrat a Majumder, V. Solanki, semiconductor surfaces I. Mishra, S.R. Joshi (from IOP) and Lambda DNA and Plasmid DNA are being D.K. Avast hi, D. Kanjilal (IUAC) N. Delhi used t o understand t he interact ion of Making polymer PDMS and biomolecules wit h Mica surface and semiconductor surfaces biocompatible semiconductor surfaces. Patterned surfaces have also been interacted with XPS studies are being carried out on the these DNA. The DNA molecules undergo Polymer surfaces irradiated by Plasma severe perturbation on their interaction treatment. Contact angle Measurement with these surfaces. These perturbations studies indicate an increase of are also reflected in the geometry as seen Hydrophilicit y suggesting an increased by AFM and electronic properties. CV biocompatibility.T he effect of plasma measurement s, A FM and XPS st udies treatment on biocompatibility was indicate several conformal changes.

S. Varma, S. Majumdar, Indrani Mishra

57

4 PUBLICATIONS

4.1. Journal 59

4.2. Pre-prints / Submitted / Accepted for Publication 63

4.3. Articles in Proceedings 64

4.4. Books 66 58 59 Publications 4.1. JOURNAL Mod.Phys.Lett. A27 (2012) 1250009.

Theoretical Condensed Matter Physics 10) B. Chandrasekhar, S. Mukherji, A. Sahay, S. Sarkar : A Comparative Note on Tunnel- 1) P. Sadhukhan, and S. M. Bhattacharjee : ing in AdS and in its Boundary Matrix Dual. , Entangl ement entropy of a quantum JHEP 1205 (2012) 004. unbinding transition and entropy of DNA, EuroPhys. Lett 98 (2012) 10008. 11) Ambresh Shivaji, Subhadip Mitra, and Pankaj Agrawal : Associated production of 2) S. Rana, S. Lahiri and A. M. jayannavar a KK-graviton with a Higgs boson via gluon : The role of soft versus hard bistable systems fusion at the LHC, Eur. Phys. J. C 72, 1922 on stochastic resonance using average (2012). cycle energy as a quantifier . Eur. Phys. J. B 84 2 (2011) 323-329 . 12) Ambresh Shiv aji, V. Rav indran, and Pankaj Agrawal : Production of a KK- 3) S. Lahiri, S. Rana and A. M. Jayannavar, : graviton and a vector boson in ADD model Fluctuation theorems in presence of via gluon fusion, J. High Energy Phys. 1202, information gain and feedback, J. Phys. A: 057 (2012) Math Theor. 45 (2012) 065002. 13) R. K. Mohapatra, P. S. Saumia, and A. M. 4) S. Saikia, A.M. Jayannavar and Mangal Srivastava : “ Enhancement of flow C. M ahato : Stochastic Resonance in anisotropies due to magnetic field in Periodic Potentials Phys. Rev. E 83, 061121 relativistic heavy-ion collisions”, , Mod. Phys. (2011) Lett. A 26, 2477 (2011).

5) Sudipto Muhuri, Ignacio Pagonabarraga, 14) A. Atreya, A. Sarkar, and A. M. Srivastava Jaume Casedemunt : Instrinsic oscillations : “ Spontaneous CP violation in quark of polymerizing antiparallel microtubules in scattering from QCD Z(3) interfaces”, Phys. a motor bath , EPL, 98, 68005 (2012) Rev. D 85, 014009 (2012).

6) Sudipto Muhuri and Ignacio Theoretical Nuclear Physics Pagonabarraga, J.Stat.Mech : Phase segregation and transport in a two species 15) S. K. Ghorui, B. B. Sahu, C. R. Praharaj and multi-lane system, P11011 (2011). S. K. Patra : Examining the stability of Sm nuclei around N 100= , , Phys. Rev. C 85 (2012) 7) Sudipto M uhuri, Lenin Shagolsem and 064327. M adan RaoBidirectional transport in a multispecies TASEP model, , Phys. Rev. E, 84, 16) B.B. Sahu, S.K. Singh, M. Bhuyan, S.K. 031921 (2011). Ghorui, Z. Naik, S.K. Patra and C. R. Praharaj Theoretical High Energy Physics : Spectroscopy study of 161,163Er in deformed Hartree-Fock theory, Acta Physics Polanica 8) S. Banerjee, S. K. Chakrabarti, S. Mukherji, B43 451 (2012). B. Panda : Black hole phase transitions via Bragg-Wi lliams, Int.J.Mod.Phys. A26 (2011) 17) Bidhubhusan Sahu, S. K. Agarwalla, and 3469-3489. S. K. Patra : Study of Half-Lives of Proton Emitters Using Relativistic Mean Field Theory, 9) S. Bhowmick, S. Mukherji : Anisotropic Phys. Rev. C84 (2011) 054604. Power Law Ination from Rolling Tachyons. , Publications 60 18) B. K. Sahu, M. Bhuyan, S. Mahapatro and 309-318. S. K. Patra, Int. J. Mod : The  - decay chains of the 287,288 115 isotopes using relativistic 26) J/ø Production as a Function of Charged mean field theory, Phys. E20 (2011) 2217. Particle Multiplicity in pp Collisions at  7 TeVs . ALI CE Collaboration (B. Abelev (LLNL, 19) A. Shukla, Sven Aberg and S. K. Patra : Liv ermore) et al.). Feb 2012. Published in Nuclear structure and reaction properties of Phys.Lett. B712 (2012) 165-175 even-ev en Oxygen isotopes towards drip line, J. Phys. G38 (2011) 095103. 27) Heavy flavour decay muon production at forward rapidity in proton—proton 20) BirBikram Singh, B. B. Sahu and S. K. Patra collisions at  7 TeVs . ALI CE Collaboration :   decay and the fusion phenomena in (Betty Abelev et al.). Jan 2012. 20 pp. heavy ion collisions using nucleon-nucleon Published in Phys.Lett. B708 (2012) 265-275 interactions deriv ed from relativistic mean field theory, Phys. Rev. C83 (2011) 064601. 28) M easurement of Ev ent Background Fluctuations for Charged Particle Jet 21) BirBikram Singh, M . Bhuyan, S. K. Patra Reconstruction in Pb-Pb collisions at  7 TeVs and Raj K. Gupta : Optical potential obtained TeV . ALICE Collaboration (Betty Abelev et from relativistic-mean- field theory based al.). Jan 2012. Published in JHEP 1203 (2012) microscopic nucleon-nucleon interaction: 053 Applied to cluster radioactive decays (arxiv: nucl-th: 1011.5732v2), J. Phys. G39 (2012) 29) Light vector meson production in pp 025101. collisions at  7 TeVs . ALICE Collaboration (B. Abelev et al.). Dec 2011. Published in 22) R.N. Panda and S.K. Patra : Structure Phys.Lett. B710 (2012) 557-568 effect on one neutron removal reaction using relativistic mean field densities in 30) Measurement of charm production at Glauber model, Int. J. Mod. Phys. E12 (2011) central rapidity in proton-proton collisions at 2505.  7 TeVs . ALI CE Collaboration (B. Abelev (LLNL, Livermore) et al.). Jan 2012. 24 pp. 23) C. R. Praharaj, S. K. Patra, R. K. Bhow mik Published in JHEP 1201 (2012) 128 and Z. Naik : Band structures and deformations of rare-earth nuclei, J. Phys.: 31) J/ polarization in pp collisions at  7 TeVs . Conf. Series 312 (2011) 092052. ALICE Collaboration (B. Abelev et al.). Nov 2011. Phys.Rev.Lett. 108 (2012) 082001 24) M. Bhuyan, S. K. Patra and Raj K. Gupta : Relativistic mean-field study of the 32) Particle-yield modification in jet-like properties of Z=117 nuclei and the decay azimuthal di-hadron correlations in Pb-Pb

collisions at NN  76.2 TeVs . ALICE Collaboration chains of the 293,294 117 isotopes, Phys. Rev. (K. Aamodt (Bergen U.) et al.). Oct 2011. 15 C84 (2011) 014317. pp. Phys.Rev.Lett. 108 (2012) 092301

High Energy Nuclear Physics 33) Harmonic decomposition of two-particle angular correlations in Pb-Pb collisions at 25) Multi-strange baryon production in pp NN  76.2 TeVs . ALI CE Collaboration (K. Aamodt collisions at  7 TeVs with ALICE. A Large Ion (Bergen U.) et al.). Sep 2011. 26 pp. Phys.Lett. Collider Experiment Collaboration (Betty B708 (2012) 249-264 Abelev (LLNL, Livermore) et al.). Apr 2012. mult. pp. Published in Phys.Lett. B712 (2012) 34) Higher harmonic anisotropic flow 61 Publications measurements of charged particles in Pb- 42) T. Mehrtens, S. Bley, P. V. Satyam and A.

Pb collisions at NN  76.2 TeVs . ALICE Collaboration Rosenauer : Optimization of the preparation (K. Aamodt (Bergen U.) et al.). May 2011. 10 of GaN-based specimens with low-energy pp. Phys.Rev.Lett. 107 (2011) 032301. ion milling for (S)TEM, Micron 43 (2012) 902 Quantum Information 43) J C Mahato, D Das, R R Juluri, R Batabyal, 35) Indranil Chakrabarty, Pankaj Agrawal, A Roy, P V Satyam, B N Dev : Nanodot to and A. K. Pati : Quantum Dissension: nanowire: A strain-driv en shape transition in Generalizing Quantum Discord for Three- self-organized endotaxial CoSi2 on Si (100) - Qubit States , Eur. Phys. J. D 65, 605 (2011). Applied Physics Letters 100 (2012) , 263117- 263117-5 36) A. K. Pati, I ndranil Chakrabarty, and Pankaj Agrawal : Purification of Mixed State 44) A. Rosenauer, T. Mehrtensa, K. Muller, K. with Closed Timelike Curv e is not Possible, Gries, M. Schowalter, P. V. Satyam, S. Bley, Phys. Rev. A 84, 062325 (2011). C. Tessarek, D. Hommel, K. Sebald, M . Seyfried, J. Gutowski, A. Avramescu, K. Engl 37) A. K. Pati, I ndranil Chakrabarty, and and S. Lutgen : Composition mapping in Pankaj Agrawal : Quantum States, InGaN by scanning transmission electron Entanglement and Closed Timelike Curves, microscopy - Ultramicroscopy 111 (2011) AIP Conf. Proc. 1384 76 (2011). 1316

38) Satyabrata Adhikari, Indranil 45) P. Santhana Raman, K.G.M Nair, M . Chakrabarty, Pankaj Agrawal : Probabilistic Kamruddin, A.K. Tyagi, A. Rath, P.V. Satyam, Secret Sharing Through Noisy Quantum B.K. Panigrahi and V. Ravichandran : MeV Channels, Quan. Inf. and Comp. 12 0253 Au2+ ions induced surface patterning in (2012). silica - Applied Surface Science 258 (2012) 4156 39) Indranil Chakrabarty, Pankaj Agrawal, and Arun K. Pati : Locally Unextendible Non- 46) R. Kundu, P. M ishra, B.R. Sekhar, J. maximally Entangled Basis, Quan. Inf. and Chaigneau, R. Haumont, R. Suryanarayanan, Comp. 12 0271 (2012). J.M. Kia : Electronic structure of Bi1-x Pbx FeO 3 from photoelectron spectroscopic studies - Experimental Condensed Matter Physics Solid State Communications 151, 256 (2011).

40) A. Rath, J. K. Dash, R. R. Juluri, Knut 47) B. Joseph, B. Schiav o, G. D Staiti and B.R. Mueller, A. Rosenauer and P.V. Satyam : Sekhar : An experimental investigation on the Nano scale phase separation in Au-Ge poor hydrogen sorption properties of nano- system on ultra clean Si(100) surfaces. Marco structured LaNi prepared by ball-milling - Schowalter J. Appl. Phys.111, 104319 (2012): 5 arXiv:1202.0614 International Journal of Hydrogen Energy, 36, 13, 7914 (2011). 41) A. Rath, J. K. Dash, R. R. Julur, A. Rosenauer, Marcos Schoewalter and P.V. 48) P. Pal, M.K. Dalai, B.R. Sekhar, I. Ulfat, M. Satyam : Growth of Oriented Au Merz, P. Nagel and S. Schuppler : Resonant Nanostructures: Role of Oxide at the photoemission spectroscopy studies of the Interface - J. Appl. Phys. 111, 064322 (2012): magnetic phase transitions in Pr 0.5 Sr 0.5 MnO 3 arXiv:1203.0819 - Physica B,406, 3539 (2011) Publications 62 on structural and magnetic properties of thin 49) M. K. Dalai, R. Kundu, P. Pal, M. Bhanja, B. Pt/Cr/Co multilayers” – Nucl. Instr. Meth. R. Sekhar and C. M artin : XPS study of Phys. Res. B 272 (2012) 96. Pr Ca MnO (x = 0.2, 0.33, 0.4 and 0.84) - 1x x 3 57) L.M .C. Pereira, T. Som, J. Journal of Alloys and Compounds, 509, 29, Demeulemeester, M.J. Van Bael, K. Temst, 7674 (2011) and A. Vantomme : “Paramagnetism and antiferromagnetic interactions in Cr-doped 50) R. Kundu, P. Mishra and B. R. Sekhar, M. GaN” – J. Phys.: Condens Matter 21 (2011) Maniraj and S. R. Barman : Electronic 346004. Structure of single crystal and highly oriented pyrolitic graphite from ARPES and KRIPES - 58) A. Gupta, R.S. Chauhan, D.C. Agarwal, Physica B, 407 827 (2012) S. Kumar, S.A. Khan, S. Mohapatra, A. Tripathi, and T. Som : “Role of melting temperature in 51) D. Samal, R. Kundu, M K. Dalai, B. R.Sekhar intermixing of miscible metal/metal bilayers and P.S. Anil Kumar : Time ev olution of induced by swift heavy ions” – Rad. Eff. and resistance in response to magnetic field: the Defects in Solids 166 (2011) 689. evidence of glassy transport in

La 0.85 Sr 0.15 CoO 3 59) H. Rath, P. Dash, T. Som, Jai Prakash, A. Tripathi, D.K. Avasthi, U.P. Singh, and N.C. 52) M. K. Dalai, P. Pal, B. R. Sekhar, M. Merz, Mishra : “Surface evolution of titanium oxide P. Nagel, S. Schuppler, C. Martin : Electronic thin film with swift heavy ion irradiation” – Structure of Electron Doped CMR Rad. Eff. and Defects in Solids 166 (2011) 571. Ca Pr MnO - Phys. Rev . B 85, 155128 0.86 0.14 3 60) Subrata Majumder, R.R. Medicherla, D. (2012). Paramanik, V. Solanki, I. Mishra and ShikhaVarma : Formation of Patterns and 53) Sandeep Kumar Garg, V. Venugopal, T. scaling properties of Tantalum surfaces after Basu, O.P. Sinha, S. Rath, D. Kanjilal, and T. low energy ion beam irradiation, S Rad. Eff. Som : Ev olution of ripple morphology on and Def in Sol. 166, (2011) 592. Si(100) by 60 keV argon ions” – Appl. Surf. Sci. 258 (2012) 4135. 61) Sasmita Prusty, Gopa M ishra, B. K. Mohapatra, Shikha Varma, S.K. Singh and D. 54) Jyoti Ranjan Mohanty, Tanmoy Basu, D. K. Mishra : Structural and micro-structural Kanjilal, and T. Som : “Formation of self- properties of fused ZrO -mullites, Materials organized nanostructures on semi-insulating 2 InP by 100 2 keV Ar+-ion irradiation” –Appl. and Manufacturing Processes 26 (2011) 282. Surf. Sci. 258 (2012) 4139. 62) Sankar Mohapatra, R. Sakthivel, G.S. Roy, 55) V. Venugopal, Sandeep Kumar Garg, Shikha Varma, S.K. Singh and D. K. Mishra : Tanmoy Basu, Om Prakash Sinha, D. Kanjilal, Synthesis of  -SiC Powder from Bamboo S. R. Bhattacharyya, and T. Som : Leaf in DC Extended Thermal Plasma “Nanostructures on GaAs surfaces due to 60 Reacter, Materials and M anufacturing + keV Ar -ion beam sputtering” – Appl. Surf. Sci. Processes 26 (2011) 1362. 258 (2012) 4144. 63) M.K. Hota,Sandipan Mallik,Chandan K. 56) J. K. Tripathi, M. O. Liedke, T. Strache, S. N. Sarkar, S. Varma and C.K. Maiti : Structural Sanragi, R. Groetzschel, A. Gupta, and T. Som and Electrical Properties of radio frequency : “Effect of low energy He+-ion irradiation 63 Publications structural, optical, morphological and sputtered HfTaO x Films for High -k gate electrical properties of thermally deposited I nsulator-Japanese Journal of Applied lead selenide (PbSe) nanocrystalline thin Physics, 50 (2011) 101101 films”–J. Cryst. Growth. 64) Ashok Kumar, Subhash Thota, Shikha 7) JK Dash, A Rath, RR Juluri, PV Satyam : Varma, and Jitendra Kumar : Sol-gel synthesis Shape evolution of M BE grown Si Ge of highly luminescent magnesium oxide 1-x x structures on high index Si (5 5 12) surfaces: nanocrystallites Jour. Of Luminescence, 131 A temperature dependent study -Arxiv (2011) 640. preprint arXiv:1205.6039, under review, 2012

4.2. PRE-PRINTS / SUBMITTED / 8) A Rath, JK Dash, RR Juluri, PV Satyam : ACCEPTED FOR PUBLICATION Structural modification in Au/Si (100) system: Role of surface oxide and vacuum level- 1) S. Ghosh, G. Gopal Khan, K. Mandal, S. Arxiv preprint arXiv:1204.5370, under review, Varma : Effect of nitrogen/fluorine in the 2012 defect driven intrinsic room-temperature ferromagnetism of Li-N/F co- doped ZnO 9) A Rath, RR Juluri, PV Satyam : Dynamic and nanowires Submitted. Static Transmission Electron Microscopy Studies on Structural Evaluation of Au nano 2) V. Venugopal, T. Basu, S. Garg, J. K. Tripathi, islands on Si (100) Surface-Arxiv preprint S. Chandramohan, P. Das, T. K. Chini, S. R. arXiv:1204.4618, under review, 2012 Bhattacharyya, D. Kanjilal, and T. Som : “Ion erosion induced nanostructured 10) JK Dash, T Bagarti, A Rath, RR Juluri, PV semiconductor surfaces: Potential templates Satyam : Universality in Shape Evolution of Si Ge Structures on High Index Silicon for magnetic thin films”–Int. J. 1-x x Nanotechnology (In Press). Surfaces-Arxiv preprint arXiv :1204.0578; under rev iew 2012 3) S. Chatterjee, A. K. Behera, A. Banerjee, L.C. Triv edi, T. Som, and P. Ayyub : 11) R. K. Mohapatra, P. S. Saumia, and A. M. “Nanometer-scale sharpening and surface Sriv astav a : “ Probi ng the ani sotropi c roughening of ZnO nanorods by argon ion expansi on hi story of the uni verse wi th bombardment” – Appl. Surf. Sci. (In Press).” cosmic microwave background”, arXiv:1111.2722.

4) R. Sivakumar, Mohit Kumar, C. Sanjeev i 12) U. S. Gupta, R. K. M ohapatra, A. M . Raja, and T. Som : “Enhancement in optical Srivastav a, and V. K. Tiw ari : “ Effects of transmittance of indium tin oxide thin films quarks on the formation and evolution of grown by pulsed dc magnetron sputtering: Z(3) walls and strings in relativistic heavy-ion Effects of pulsing frequency and collisions”, arXiv :1111.5402. annealing”–J. Vac. Sci. Technol. A. 13) R. K. Mohapatra, P. S. Saumia, and A. M. Srivastava, : “ Analyzing flow anisotropies 5) T. Basu, J. R. Mohanty, and T. Som : with excursion sets in relativistic heavy-ion “Unusual pattern formation on Si(100) due to collisions”, arXiv :1112.1177. low energy ion bombardment”–Appl. Surf. Sci. 14) Shakeb Ahmad, M . Bhuyan and S. K. 6) T.S. Shyju, S. Anandhi, R. Sivakumar, S.K. Patra : Properties of Z 120= nuclei and the Garg, R. Gopalakrishnan : “Investigation on Publications 64  -decay chains of the 292,304 120 isotopes electron beam induced clustering of indium using relativistic and nonrelativistic by STEM HAADF Z-contrast imaging, Journal formalisms, Communicated to Phys. Rev. C. of Physics: Conference Series 326, 012040

15) S. K. Ghorui, Z. Naik and S. K. Patra, Int. J. 5) B. B. Sahu and S. K. Patra : Microscopic Mod. : Rotational bands and nucleon-nucleon interaction obtained from electromagnetic transitions of some even- relativistic mean field theory and its even Neodymium nuclei in PHF model, application to nuclear decay, National International Journal of Physics. E (In Press). Conference on Recent Advances in Science and Technology (RAST-2012) Feb. 27- 16) R.C. Nayak and L. Satpathy, M ass 28, 2012. Predictions of Atomic Nuclei in the Infinite Nuclear Matter Model" (in press). 6) B. B. Sahu and S. K. Patra, : Microscopic study of proton emission from heavy nuclei, 17) Subrata M ajumder, D. Paramanik, V. Proceeding of DAE Symp. On Nucl. Phys. 56, 516 (2011). Solanki, I. Mishra, D.K. Avasthi, D. Kanjilal and ShikhaVarma : Ion Irradiation induced Nano 7) B. B. Singh, B. B. Sahu and S. K. Patra : Pattern Formation on TiO single Crystal- 2 Study of the fusion phenomena in heavy ion Appl. Surf. Sci. (2012) in press. collisions and the   decay using nucleon- nucleon interaction deriv ed from relativistic mean field theory. Proceeding of DAE Symp. 4.3. ARTICLES IN PROCEEDINGS On Nucl. Phys. 56, 546 (2011). 1) Ambresh Shivaji and Pankaj Agrawal : 8) B. B. Sahu, S. K. Singh, M. Bhuyan, S. K. Multi vector boson production v ia gluon Ghorui, Z. Naik, S. K. Patra and C. R. Praharaj fusion at LHC, in proceedings of “10th I nternational Symposium on Radiativ e : Band Structure study of 161 Er nucleus, Corrections” PoS(RADCOR2011)010. Proceeding of DAE Symp. On Nucl. Phys. 56, 308 (2011). 2) Subhadip Mitra, Ambresh Shivaji, and Pankaj Agrawal : Production of KK-gravitons 9) M. Bhuyan and S. K. Patra : Journey to in association with a boson via gluon fusion superheav y v alley, Proceeding of DAE in the LHC, in proceedings of “10th Symp. On Nucl. Phys. 56, 148 (2011). I nternational Symposium on Radiativ e 10) M. Bhuyan and S. K. Patra : The Structure Corrections” PoS(RADCOR2011)045. and Stability of superheavy nuclei, Proceeding of DAE Symp. On Nucl. Phys. 56, 3) B Sundaravel, S Kalavathi, P 192 (2011). SanthanaRaman, PV Satyam, KGM Nair, R Mittal, AK Chauhan, R Mukhopadhyay : 11) A. Shukla, A. Aberg and S. K. Patra : Formation of NiSi2 nanoclusters by Ni ion Shape and structure of N=Z nuclei in A=80 implantation into Si (100) and the effect of mass region, Proceeding of DAE Symp. On preinjection of Si2+ ions-AIP Conference Nucl. Phys. 56, 274 (2011). Proceedings-American Institute of Physics V 1447 (2012) 285 12) A. Shukla, A. Aberg and S. K. Patra : Bubble nuclei in relativistic mean field theory, 4) A Rosenauer, T Mehrtens, K Müller, K Gries, Proceeding of DAE Symp. On Nucl. Phys. 56, M Schow alter, S Bley, PV Satyam : 2D- 276 (2011). composition mapping in I nGaN without 13) A. Shakeb, M. Bhuyan and S. K. Patra : 65 Publications Superdeformed ground state in Z=120 nuclei relativistic mean field theory, B. B. Singh, B. and the   decay chain of the 292,304120 B. Sahu and S. K. Patra, Proceeding of DAE isotopes, Proceeding of DAE Symp. On Nucl. Symp. On Nucl. Phys. 56, 546 (2011). Phys. 56, 294 (2011). (22) Band Structure study of 161Er nucleus, B. 14) B B Singh, M. Bhuyan, S. K. Patra and R. B. Sahu, S. K. Singh, M . Bhuyan, S. K. Ghorui, K. Gupta : The RMF based R3Y vs the M3Y NN Z. Naik, S. K. Patra and C. R. Praharaj, interaction for the cluster radioactive decay Proceeding of DAE Symp. On Nucl. Phys. 56, studies, Proceeding of DAE Symp. On Nucl. 308 (2011). Phys. 56, 304 (2011). (23) Journey to superheavy valley, M. Bhuyan 15) S. K. Ghorui, Z. Naik, S. K. Patra. A. K. Singh, and S. K. Patra, Proceeding of DAE Symp. P. K. Raina, P. K. Rath and C. R. Praharaj : K- On Nucl. Phys. 56, 148 (2011). isomeric bands of highly deformed neutron- (6) The Structure and Stability of superheavy rich Nd nuclei in PHF model, Proceeding of nucl ei , M. Bhuyan and S. K. Patra, DAE Symp. On Nucl. Phys. 56, 338 (2011). Proceeding of DAE Symp. On Nucl. Phys. 56, 192 (2011). 16) M. S. Mehta and S. K. Patra : Shell closure at N=32, 34 in drip-line nuclei, Proceeding (24) Shape and structure of N=Z nuclei in of DAE Symp. On Nucl. Phys. 56, 450 (2011). A=80 mass region, A. Shukla, A. Aberg and S. K. Patra, Proceeding of DAE Symp. On 17) R. N. Panda, M. Bhuyan and S. K. Patra : Nucl. Phys. 56, 274 (2011). Fission energy from neutron rich U and Th isotopes, Proceeding of DAE Symp. On Nucl. (25) Bubble nuclei in relativistic mean field Phys. 56, 504 (2011). theory, A. Shukla, A. Aberg and S. K. Patra, Proceeding of DAE Symp. On Nucl. Phys. 56, 18) M. K. Sharma, M. S. Mehta and S. K. Patra 276 (2011). : Nuclear reaction cross-section of 22 C using Glauber model and relativistic mean field (26) Superdeformed ground state in Z=120 formalism, Proceeding of DAE Symp. On nuclei and the   decay chain of the Nucl. Phys. 56, 578 (2011). 292,304120 isotopes, A. Shakeb, M. Bhuyan and S. K. Patra, Proceeding of DAE Symp. On (19) M i croscopi c nucl eon-nucl eon Nucl. Phys. 56, 294 (2011). interaction obtained from relativistic mean field theory and its application to nuclear (27) The RMF based R3Y vs the M3Y NN decay, B. B. Sahu and S. K. Patra, National interaction for the cluster radioactive decay Conference on Recent Advances in studies, B B Singh, M. Bhuyan, S. K. Patra and Science and Technology (RAST-2012) Feb. 27- R. K. Gupta, Proceeding of DAE Symp. On 28, 2012. Nucl. Phys. 56, 304 (2011).

(20) Microscopic study of proton emission (28) K-isomeric bands of highly deformed from heavy nuclei, B. B. Sahu and S. K. Patra, neutron-rich Nd nuclei in PHF model, S. K. Proceeding of DAE Symp. On Nucl. Phys. 56, Ghorui, Z. Naik, S. K. Patra. A. K. Singh, P. K. 516 (2011). Raina, P. K. Rath and C. R. Praharaj, Proceeding of DAE Symp. On Nucl. Phys. 56, (21) Study of the fusion phenomena in heavy 338 (2011). i on col l isi ons and the   decay usi ng nucleon-nucleon interaction derived from (29) Shell closure at N=32, 34 in drip-line Publications 66 nuclei, M. S. Mehta and S. K. Patra, 4.4. BOOKS / SPECIAL ISSUE Proceeding of DAE Symp. On Nucl. Phys. 56, 450 (2011). Proceedings of IINM - 2011 in Applied Surface Science as a special issue (Vol 258, (30) Fission energy from neutron rich U and 2012) : Edited by T. Som and S. Varma. Th isotopes, R. N. Panda, M. Bhuyan and S. K. Patra, Proceeding of DAE Symp. On Nucl. Phys. 56, 504 (2011).

(31) Nuclear reaction cross-section of 22 C using Glauber model and relativistic mean field formalism, M. K. Sharma, M. S. Mehta and S. K. Patra, Proceeding of DAE Symp. On Nucl. Phys. 56, 578 (2011).

67

SEMINARS AND 5 COLLOQUIA

5.1. Colloquia 69

5.2. Seminars 69

5.3. Lectures given elsewhere by IOP members 73

5.4. Lectures given at the Institute by IOP members 75

5.5 Popular Lectures Given by IOP Members 76 68 69 Seminars & Colloquia 5.1. COLLOQUIA 10) Prof. Ignatios Antoniadis, CERN : Finding Strings at LHC ?, March 03, 2012. 1) Dr. Kousik Dutta, DESY : M odels of Inflation : New developments, April 04, 5.2. SEMINARS 2011. 1) Swapan Mahji, Saha Institute of Nuclear 2) Prof. Kalobaran Maiti,Department of Physics, Kolkata : Higher order Radiative Condensed Matter Physics and Corrections in Collider Physics, May 05, Materials Science,TIFR, Mumbai : Novel 2011. non-magnetic phase in magnetic materials - universality of Kondo effect, 2) Dr. Tae-Hun Lee, S.N.Bose Centre, April 18, 2011. Kol kata : A Particle Carrying Non- Abelian Charge, May 27, 2011. 3) Prof. Krishnendu Sengupta, IACS : Bosons in Optical Lattice : Gauge Field, Tilt and 3) Prof.M.K.Parida, HRI, Allahabad : Dynamics, August 01, 2011. Predictive Unification, Dark Matter and Neutrino Masses, June 03, 2011. 4) Prof. Sourendu Gupta, TIFR, Mumbai : Phases of QCD, August 08, 2011. 4) Dr. Navinder Singh, PRL, Ahmedabad : Explaining the long coherence effects 5) Prof. D.P.Roy, Homi Bhabha Centre for in photosynthetic exciton energy Sci ence Educati on,Tata Institute of transfer as observ ed by 2D photon echo Fundamental Research, M umbai : spectroscopy: TCPS model, June 09, Standard Model and Beyond, 2011. September 30, 2011. 5) Dr. Pallav Basu, Kentucky University : An 6) Prof. Peter A. Dowben, Universi ty of Excursion in Holographic Condensed Nebraska-Lincoln, USA : Graphene/ Matter Systems, June 30, 2011. substrate initial state charge transfer and final state effects characterized by 6) Dr. Sarira Sahu, Instituto de Cienci as electron spectroscopies, December 09, Nucleares Universidad Nacional 2011. Autonoma de Mexico Mexico City : Very High Energy Cosmic Ray and 7) Prof. Subhendra Mohanty, Physi cal Neutrino Ev ents from Centaurus A, July Research Laboratory, Ahmedabad : 15, 2011. Cosmological Consequences of Higgs Mass Measurement at Atlas and CMS, 7) Prof. Sumit R. Das, University of Kentucky February 08, 2012. : Quantum Quench and Holography, July 25, 2011. 8) Dr. S. Triambak, Department of Physics & Astrophysics University of Delhi, Delhi 8) Dr. Jagjit Nanda, OakRi dge National : Precision nuclear physics Lab., OakRidge, USA : Energy Storage measurements : Their Context and R&D: From Fundamental Science to importance, February 09, 2012. Application, August 02, 2011.

9) Prof. Jayanta Bhatacharjee, SN Bose 9) Dr. Sadhan Dash, (f or the ALICE Centre, Kolkata : Oscillators : Old and Collaboration) Universi ta and INFN di New, February 27, 2012. Tori no, ITALY : Open Charm Seminars & Colloquia 70 Reconstruction in ALICE Experiment at Sweden : Electronic structure, LHC, August 18, 2011. vibrational properties and spin dynamics of some selected magnetic 10) Dr. R. Sivakumar, Alagappa University : systems, October 11, 2011. Studies on ITO thin films by pulsed dc sputtering technique, August 29, 2011. 19) Prof. Jogesh Pati , Physi cs Dept., Universityi of M aryland, USA : Grand 11) Dr.S. Dhara, Indira Gandhi Centre for U nification: I ssues of Proton Decay, Atomic Research, Kalpakkam : Physical Neutrino Oscillations and the Early Properties of GaN, September 09, 2011. Universe, October 14, 2011.

12) Dr. Dinesh Topwal, Scientist ,Sincrotrone 20) Debakanta Samal, I ISc., Bangalore: Trieste S.C.p.A.(ELETTRA) ,Trieste, ITALY : Emergence of exotic phenomena in Spectroscopy of self assembled superconductor ferromagnet Hetero- networks and nanosystems, September structures, November 2, 2010. 12, 2011. 21) Dr. Apoorva Nagar, IIT, Hyderabad : Effect of mutators on evolution, 13) Dr. Manju Unnikrishnan, Sincrotrone October 31, 2011. Trieste S.C.P.A.(ELETTRA) ,Trieste, ITALY : Spectroscopy of self assembled 22) Dr.A.K.Arora, IGCAR, Kalpakkam : networks and nanosystems, September Raman spectroscopy of nanostructures, 13, 2011. November 01, 2011.

14) Dr. Mahesh Kumar Surface Physics and 23) Dr. Deepshikha Jaiswal Nagar, Nanostructures Group, National Physical Hyderabad University : Magnetocaloric Laboratory, New Delhi : Hetero-epitaxial effect and magnetic cooling near a grow th by surface modifications of field-induced quantum-critical point, semiconductor and insulator substrates, November 01, 2011. September 16, 2011. 24) Dr.A. Shukla, RGIPT, Raeborali : Double 15) Prof. C.S. Unnikrishnan, TIFR, Mumbai : Beta Decay: Present Status & Future Matter Wave Interferometry with Ultra- Prospects, November 14 2011. cold Atoms: Fundamental Physics and Applications, September 20, 2011. 25) Mr. Amit Sharma, National Centre for Biological Sciences,(NCBS – TIFR) 16) Prof. M.K.Parida, HRI, Allahabad : Bangalore : Structure and function of Radiative see saw for neutrino mass with DNA replicating machinery – dark matter in Grand Unified Theory, Perspectiv e to multi drug resistance in September 22, 2011. TB, November 05, 2011.

17) Dr. S M Yusuf, Solid State Physics Division, 26) Dr. Sudhanwa Patra, PDF, IOP : Bhabha Atomic Research Centre, Superluminal neutrino and Lorentz M umbai : Functional Magnetic violation, November 8, 2011. Materials: Fundamental and Technological Aspects, October 11, 27) Dr. Chandra Sekhar Rout, Bi rck 2011. Nanotechnol ogy Center, Purdue University, USA : Optical properties of 18) Dr. Satadeep Bhattacharjee, Division of ZnO nanorods and SERS substrates Materi als Theory, Uppsala University, based on metal nanoparticles 71 Seminars & Colloquia decorated rapheme petal arrays, Techniques and Atom Manipulation, November 11, 2011. March 12, 2012.

28) Dr. Jyoti Ranjan Mohanty, Technical 38) Prof. Abhijit Bhattacharya, Department University Berlin, Germany : Magnetism of Physics, University of Calcutta : The at nanoscale: Nano-small meets Ultra- thermodynamic properties of strongly fast, November 30, 2011. interacting matter, March 19, 2012.

29) Prof. M.P. Das, Austral i an Nati onal 39) Dr. Sukanta De, School of Physics and University, Canberra : Some issues on CRANN Trinity College Dublin, Ireland : meso/nanoscopic system, December Next Generation of Transparent 13, 2011. Electrode Materials for Flexible Devices, May 04, 2011. 30) Mr. M.Bhuyan, Sambalpur Uni versity : Journey from light to superheavy nuclei, 40) Dr. Priti Sundar Mohanty , Lund University, December 15, 2011. Sweden : Escaping the squeeze: Soft particles at high effectiv e v olume 31) Prof. X.Vinas, University of Barcelona : fractions, July 08, 2011. SEM ICLASSICAL APPROXI NATI ON TO PAI RI NG I N THE WEAK COU PLI NG 41) P. K. Mohanty, SINP, Kolkata : An elegant REGI ME: NUCLEI , COLD ATOMS AND way of Multiplying Matrices, September NEUTRON STARS, December 26, 2011. 02, 2011.

32) Prof. A.Abbas, Aligarh Muslim University 42) Prof. B. P. Das, IIA, Bangalore : The Role : A = 3 Clustering in Nuclei, January 2, of Relativ istic M any-Body Theory in 2012. Probing the Standard Model of Particle Physics, June 14, 2011. 33) Dr.T.N. Sairam, IGCAR, Kalpakkam : High 43) Dr. Sankar Dhar, NUSNNI- NanoCore, Pressure Investigations of Zinc Cyanide National University of Singapore, Using Synchrotron I nfrared Absorption Singapore : Unusual material properties Spectroscopy, February 01, 2012. induced by irradiation, doping and alloying, October 13, 2011. 34) Prof. Subhendra Mohanty, PRL, Ahmedabad : Superluminal Neutrino, 44) Samrat Bhowmick, IOP : Anisotropic February 09, 2012. Inflation in Rolling Tachyon Models, June 16, 2011. 35) Dr. Satyajit Sahu, National Institute for Materi als Science, Advanced Nano 45) Dr. Payal Mohanty, VECC, Kolkata : Characteri zati on Uni t,Tsukuba : Lepton-pair interferometry : a tool to Synchrony based evolution of characterize different phases of matter microtubule and its applications, produced in heavy ion collisions, July 08, February 15, 2012. 2011.

36) Dr. Tapan Nayak, VECC, Kolkata : Heavy 46) Dr.Sarmistha Banik, SINP, Kol kata : Ion Frontier of the Large Hadron Equation of state for core collapse Collider, March 06, 2012 supernova simulation and neutron star core, November 21, 2011. 37) Dr. Kuntala Bhattacharjee, PDF, IOP : General Discussion on Different STS Seminars & Colloquia 72 47) Dr. Anurag Sahay, IOP : Thermodynamic 58) Dr. Rajdeep Sensarma, Uni v. of geometry, phase transitions and the Maryl and, USA : Dynamics with cold Widom line, July 12, 2011. atoms near and far from equilibrium, December 01, 2011. 48) Dr. Swarnendu Sarkar, Delhi University : Strong Coupling BCS Superconductivity 59) Dr. Swarup Kumar Majee, National and Holography, July 25, 2011. Tai wan Uni versity, Universal Extra- Dimension at LHC, December 05, 2011. 49) Dr. Dileep Jatkar, HRI, Allahabad : New Massive Gravity from AdS_4 Counter 60) Dr. Ramesh Chandra Nath, Indi an Terms, October 20, 2011. Insti tute of Sci ence Education and Research,Thi ruvananthapuram : 50) Ambresh Shivaji, IOP : KK-grav ition Interesting Ground State Properties of production in association with a vector Frustrated Low-dimensional Spin Boson via Gluon Fusion in ADD models, Systems, December 05, 2012. November 23, 2011. 61) Dr. Santosh K. Rai, Okl ahoma State 51) Dr. Sachin Jain, IOP : Action Principle for University : Reading the LHC Data with Hydrodynamics, February 17, 2012. Leptonic Spectacles, December 07, 2011

52) Dr. Binata Panda, HRI : Heat Kernal 62) Dr. Sanjib Kumar Agarwalla, Universitat Expansion and Extremal Black Hole in de Val enci a : Neutrino Oscillation Einstein Maxwell Theory, February 28, Parameters: Current Know ledge and 2012. Future Goals, December 07, 2011.

53) Mr. Souvik Banerjee, IOP : Holographic 63) Dr. Tanumoy Pramanik, SNBCBS : Fine- Spectral Functions in Non-equilibrium grained uncertainty relation and states, March 16, 2012. nonlocality of tripartite systems, 54) Prof. J. Maharana, IOP : T-Duality of NSR December 09, 2012. Superstring : A Worldsheet Perspectiv e, March 23, 2012. 64) Arnab Das, IOP : Dynamical Freezing, December 29, 2012. 55) Dr. Maheswar Nayak, RRCAT, Indore : Physics of Nano-scaled X-ray Multilayer 65) Dr. Sourin Das, Delhi University : Looking and novelty of resonant x-ray scattering for neutral modes in non-abelian for basic surface/interface science, quantum hall states via thermoelectric September 19, 2011. effect, February 13, 2012.

56) Prof. J.C. Pati, University of Maryland, USA 66) Dr.P.Sanyal, S.N.Bose Center, Kolkata : : Grand Unification: A Historical “Double exchange in double Perspective and Current Status, perousbites : normal magnetic phase October 12, 2011. transitions”, February 17, 2012.

57) Dr. Bhaskar Chandra Mohanty, 67) Dr. Rajdeep Sensarma, Uni v. of Department of Mat. Sci. and Engg., Maryl and, USA : Dynamics with cold Yonsei University Seoul, South Koria : atoms near and far from equilibrium, Growth dynamics of ZnO thin films for December 01, 2011. photovoltaic applications, Nov ember 08, 2011. 73 Seminars & Colloquia 68) Dr. Ramesh Chandra Nath, Indi an structure & spatially resolv ed electronic Insti tute of Sci ence Education and properties, February 10, 2012. Research,Thi ruvananthapuram : Interesting Ground State Properties of 78) Prof. Andres Reyes Lega, Universidad de Frustrated Low-dimensional Spin Los Andes Bogota, Columbia : Some Systems, December 05, 2011. uses of fiber bundles and topology in physics, February 02, 2012. 69) Dr. Swarup Kumar Majee, National Taiwan Universi ty : U niv ersal Extra- 79) Dr. Sourin Das, Delhi University : Looking Dimension at LHC, December 05, 2011. for neutral modes in non-abelian quantum hall states via thermoelectric 70) Dr. Santosh K. Rai, Okl ahoma State effect, February 13, 2012. University : Reading the LHC Data with Leptonic Spectacles, December 07, 80) Dr.P.Sanyal, S.N.Bose Center, Kolkata : 2011. Double exchange in double perousbites : normal magnetic phase transitions, 71) Dr. Sanjib Kumar Agarwalla, Universitat February 17, 2012. de Val enci a : Neutrino Oscillation Parameters: Current Know ledge and 5.3. LECTURES GIVEN ELSEWHERE Future Goals, December 07, 2011. BY IOP MEMBERS

72) Dr. Tanumoy Pramanik, SNBCBS : Fine- Dr. P. Agrawal : grained uncertainty relation and nonlocality of tripartite systems, (1)Di scord, Quantumness and December 09, 2011. Generalization’, Quantum Discord Workshop, CQT, Singapore, January 9-13, 73) Prof. Hiranmaya Mishra, Physi cal 2012. Research Laboratory,Ahmedabad : Chiral symmetry breaking in strong (2) More Communication with Less magnetic fields, December 27, 2011. Entanglement’, I nternational Workshop on Quantum I nformation, HRI , Allahabad, 74) Arnab Das, IOP : Dynamical Freezing, February 20-26, 2012. December 29, 2011. Dr. S. M. Bhattacharjee :

75) Dr. Sai Vinjanampathy, Universi ty of ( 1) Entanglement entropy, UGC Conf on Massachusetts Boston : Quantum cond mat physics, Sushil Kar College, Sept Correlations in Photosynthesis, January 2011 2. 20, 2012. (2) DNA unzipping and melting, National conf 76) Dr.Aswini K. Rath Memorial Lecture on cond mat physics, Bishnupur College, Nov 2011 3. Prof. M.K.Pal, Former Director, SINP : Subrahmanyan Chandrasekhar and (3) Helicase activity on DNA, International cosmology, January 30, 2012 conference on mathematical biology, IISER, Pune, Jan 2012 4. 77) Dr. Kuntala Bhattacharjee, PDF, IOP : Self- assembly of various 1D chains: atomic (4) DNA unzipping and melting, National conf on cond matt physics, BI TS Pilani, Feb 2012 Seminars & Colloquia 74 A. M. Srivastava : Saumia P. S. :

(1) Invited talk on Probing the anisotropic (1)CMBR anisotropies and flow fluctuations: expansi on hi story of the uni verse wi th Some similarities , Invited talk at WHEPP Sat- cosmic microwave background, Indo-UK ellite Meeting, VECC, Kolkata, January, 2012. seminar “Confronting particle-cosmology with PLANCK and LHC”, at IUCAA, Pune, Aug. 2011. (2) Using CMBR tools for flow anisotropies in relativistic heavy-ion collisions Working (2) “Universe and the dark energy”, at the Group talk at WHEPP 2012, Mahabaleswar, Physics Dept., BITS, Pilani, Oct. 2011. January, 2012.

(3) Seminar on “Dark energy and our (3) Probing the anisotropic expansion history Univ erse” in the Physics Dept. Ravinshaw of the universe with cosmic microwave University, Cuttack, Oct. 2011. background, International Conference on Gravitation and Cosmology, Goa, I ndia, (4) “Dark energy in the Universe” at the December, 2011. Physics Dept., Berhampur University, on 28th Feb. 2012. Abhishek Atreya :

Dr. S. Varma : Baryon Homogeneities due to CP violating QCD Z(3) walls, International Conference on (1) Enhanced Photo-absorption and Gravitation and Cosmology (ICGC) 2011, Photoluminescence Properties of TiO2 via Goa, 16 December 2011, nanostructures created by Ion sputtering at ’Nanostructures by Ion Beams’ organised by Dr. Sachin Sarangi, SO-B : IUAC at Allahabad (Oct 2011). (2) Can DNA be used as a Sensor, National (1) "Electri cal characterization studies of w orkshop on Adv anced M aterials and nanocrystalline CdSe/Au Schottky junction Technology (NWAMT)’ organised by ITER at i nterf ace", University of Bhubanesw ar (Apr 2011). Electrocommunication,Tokyo, Japan on 1st March 2011 (3) Investigations of Rutile TiO 2 Nanodots Formed by Low energy Ion beam Sputtering 2) "Electrochemi cal growth of PN ZnO ,’National Workshop on New and nanorod diodes for UV LED Application", Nanomaterials’ organised by I nstitute of Seminar for ORI ENTATI ON FOR JSPS Materials Science and Science and POSTDOCTORAL FELLOWS held at Hanzomon, Technology Department, Govt. of Odisha, at Tokyo on Feb, 27-29, 2012 Bhubanesw ar (Jan 2012). 3) Oxide semiconductor anostructures: ZnO Dr. Anupama Chanda : and Ni O ", University of Electrocommunication, Tokyo, Japan on 11 “Highly conductive PEDOT:PSS f il ms f or June 2012. f l exi bl e and transparent el ectronics”, International Conference and Workshop on Dr. T. Som : (1) “Ion beam i nduced Nanostructured Ceramics and other processing of nanostructured materials”, Nanomaterials (ICWNCN), 13-16 March 2012, National Workshop on Advanced Materials University of Delhi, Delhi, India. And Technology (NWAM T), I TER, Bhubanesw ar on 23.04.2011. 75 Seminars & Colloquia (2) “Nanoscale fabrication of ion induced (9) Summary and Recommendation Talk, self-organized nanostructures” International National Workshop cum Theme Meeting on Conference on M aterials for Adv anced Accelerator Based Interdisciplinary Technologies, National university of Research in Basic Sciences, Guru Ghasidas Singapore, Singapore , on 27.06.2011. Vishvavidyalaya, Bilaspur , 29.03.2012.

(3) “Sputter erosi on i nduced nanoscale pattern formation on semiconductor 5.4. LECTURES GIVEN AT THE INSTITUTE BY surf aces”, International Workshop on IOP MEMBERS Nanoscale Pattern Formation at Surfaces, El Escorial, Madrid, Spain , on 20.09.2011. Dr. S. Varma : (1) Interaction of DNA with Hg clusters: tiny Mercury Sensor at ’workshop on (4) “Ion induced nanopattern formation on Photoemission Studies of Advanced semi conductor surf aces”, National Materials (PSAM)’ organised at IOP Workshop on Plasma Processing For Bhubanesw ar (Dec 2011). Thermonuclear Fusi on and I ndustrial Applications (PPTFIA-2011), KIIT Univ ersity, (2) Presented an Invited talk on Tiny Mercury Bhubanesw ar , on 10.11.2011. Sensors usi ng DNA at conference on ’Advanced Functional Materials’ organised (5) “Large area nanoscale pattern at IOP Bhubanesw ar (July 2011). formation on semi conductor surf aces by sputter erosi on” at International (3) Presented an invited talk on X-ray Conference on NanoScience, Technology photoelectron spectroscopy (XPS) and its and Societal Implications (NSTSI 2011), C.V. Applications for Nanostructures, Bi ology, Raman College of Engineering, Pol l uti on, at ’workshop on Electron Bhubanesw ar , 08.12.2011. Microscopy (WEM)’ organised at IOP Bhubanesw ar (Nov 2011). (6) “Ion induced nanopattern formation on semi conductor surf aces”, National Dr. T. Som : (1) “Synthesis of self-organized Workshop on Nanocoatings, KIIT University, nanostructures by i on beams” Advanced Bhubanesw ar , 20.03.2012 . Functi onal M aterials, Insti tute of Physics, Bhubaneswar, 29.07.2011. (7) “Experimental Condensed Matter Physics Research at Institute of Physics”, Awareness (2) “Large area nanopatterning of Workshop on The Facilities of U GC-DAE semiconductor surfaces by i on i nduced Consortium for Scientific Research, Utkal sputter erosion”, Workshop on electron University, Bhubaneswar , 24.03.2012. Microscopy (WEM2011), Institute of Physics, Bhubaneswar , 24.11.2011 . (8) “Low Energy Pel l etron Accel erator: Avenues i n Materials Research”, National (3) “I on erosion i nduced nanopatterned Workshop cum Theme M eeting on semiconductor surfaces”, Workshop on Accelerator Based Interdisciplinary Photoemission Studies of Advanced Research in Basic Sciences, Guru Ghasidas Materials (PSAM 2011), Institute of Physics, Vishvavidyalaya, Bilaspur , 29.03.2012. Bhubanesw ar 12.12.2011 . Seminars & Colloquia 76 5.5. POPULAR LECTURES GIVEN BY IOP MEMBERS

Dr. A. M. Srivastava 3. Popular talk on “Inspiration and moti- 1. Popular talk and telescope show for vation in Science” in the Science Day cel- “looking at moon and Jupiter” for class IX ebrations of the Physics Dept., Berhampur students at IMA, BBSR, Jan, 2012. University, on 28th Feb. 2012.

2. T wo t alks on “Dark Energy” at t he Dr. S. M. Bhattacharjee meetings of Samanta Chandra Sekhar Amateur Astronomers’ Association, Lect ures on Polymers, RRI School on stat Bhubanerswar, in Nov. and Dec. 2011. phys, Mar 2012.

77

CONFERENCES AND 6 OTHER EVENTS

6.1. Alumni Day 79

6.2. Foundation Day 79

6.3. WEM - 2011 79

6.4. LOP - 2011 80

6.5. PSAM - 2011 80

6.6. ISCQI - 2011 81

6.7. All India DAE Official Language Conference 81 78 79 Conferences & Other events 6.1. ALUMNI DAY 6.2. FOUNDATION DAY

T he 31st A lumni Day was The 37 th Foundation day of the celebrat ed on Sept ember 3, 2011. The Institute was celebrated on September programme started with an academic 4, 2011. This is one of the most important session which consisted of a series of event s of the Institut e, where a large lect ures by our alumni members and a number of persons from academia, colloquium by an invited distinguished media, and administration of the Odisha physicist. Government and DAE were invited. In this session we had lectures by Members of the I nst itut e family t ook eminent Allumni members of IOP, active part in the proceedings. This year Prof. Pradeep Kumar Mohanty, Saha the Chief Guest was Prof. R. Rajaraman, Institute of Nuclear Physics, Kolkata; Prof. Jawaharlal Nehru University, New Delhi. Sanjay Swain, National Institute of Science Education and Research, 6.3 WEM2011: November 23 – 25. Bhubaneswar; Prof. S. Rath, Indian The workshop on Electron Microscopy Institute of Technology, Bhubaneswar. ( WEM2011) was joint ly organized by Inst itute of Physics (I OP), Bhubaneswar The colloquium was given by and Indian Institute of Technology distinguished scientist, Prof. Deepak Dhar, Bhubaneswar ( IIT -BBSR), Bhubaneswar Tata institute of Fundamental Research, from November 23 - 25 , 2011 and was Mumbai. held at t he I nst it ut e of Physics (main The evening programme started lecture hall), Bhubaneswar. T he main with prize distribution to the winners of objective of the workshop on Electron v arious competitions in the year-long Microscopy was t o bring many young programmes. It was followed by a talk by researchers from the Eastern part of India International Indian Hockey player and provide a platform to have Mr. Dilip Tirkey, Chief Guest of the evening. interaction wit h eminent microscopists. This was followed by Excellent The topics include both Physical Sciences Bharatnatyam Dance by Miss. Medha and Life Sciences. There were 32 invited Hari and her group from Chennai. lectures from eminent scientists (including Prof. A. Rosenauer from Germany) and a Following were the office bearers poster session. One of the main aspect of Secretary : Tanmoy Pal t his workshop was pract ical training/ Assistant Secretary : Shubhashis Rana exposure on “Demonst rat ive TEM and Treasurer : Partha Bagchi SEM experiments, and Sample Faculty Advisor : Dr. P. V. Satyam Preparation methods” during the Conferences & Other events 80 evening hours. We had a total about 120 University, Institute of Metals and participants, including about 50 Materials, Institute of Material Science, student s/post doctoral fellows/young IT ER as well as from institut es outside faculties from Odisha state (mainly from Bhubaneswar like IUAC Delhi, NIT IOP, IITBBSR, NISER, IMMT). Besides the IOP Roulkela attended LOP. The total number as main contributor, DRDO (Delhi), many of registered participants (students, post private firms have supported financially. docs, scientists, faculty) was 48. Prof. M. Chakraborty, Director, IIT- Bhubaneswar was t he Chairman and 6.5 Workshop on Photoemission Prof. P. V. Satyam, IOP, was the convener Studies of Advanced Materials of the WEM2011 workshop. (PSAM)

6.4 Lectures on Photoemission (LOP) One day Workshop on Instit ut e of Physics, Bhubaneswar, ‘Phot oemission Studies of A dv anced organized a short course ‘Lect ures on Materials (PSAM)’ was held on 12 Dec. Photoemission (LOP)’ during 8 to 11 and 2011 to discuss the frontier research areas 13 December. The course was given by in the field of Photoemission techniques. Prof. Pet er A . Dowben of Universit y of There were several speakers from India Nebraska – Lincoln, USA. Prof. Peter A. as well as from one from out side. The Dowben gave nine lectures on the topics topics included: The Surface Science of of T he principles and inst rument at ion Adsorpt ion on Crystalline Ferroelectric behind photoemission, Determining Polymer Surfaces, Photoelectron surface composition from angle-resolved Spectroscopy of Nanoscale Materials, XPS, Symmet ry select ion rules in Core level spectra of disordered metallic photoemission, Inverse photoemission, alloys, Ion Erosion Induced Band mapping, Band Structure, Nanostructured Semiconductor Surfaces, Experimental band structure of Photoemission study of collective molecular overlayers, Elemental electronic excitations in metals, contributions to specific conduction and Applications of TEM – EELS, Electronic valence bands, Photoemission for Structure Studies Using Various determination of semiconductor T echniques , Photoemission studies of properties, XMCD and EXAFS. DNA .

Many facult y members, research Many facult y members, research scholars, Postdoctoral fellows and scholars, Postdoctoral fellows and scientists from IOP as well as other Institutes in Bhubaneswar like NISER, Utkal 81 Conferences & Other events scientists from Institutes in Bhubaneswar Odisha, paricipated in the school. In the and outside attended PSAM-2012. conference, there were 35 invited speakers. There were about 90 overall 6.6 International School and participants. Conference on Quantum Information - 2011 6.7 All India DAE Official Language Conference At the Institute of physics, a second school-cum-conference of t he series Institute of Physics, Bhubaneswar ISCQI, ISCQI-2011, was organized from organized t he A ll I ndia DA E Official December 13-22, 2011. School was Language Conference on 2-3 November, organized from Dec 13-17, 2011. 2011 jointly with NISER. Padmabibhushan Conference took place from Dec 19-22, Shri Sitakanta Mohapatra, Eminent Odiya 2011. It was organized by Pankaj poet was the chief guest for this meeting. Agrawal, Arun Pat i, HRI, Allahabad, I. In addition, Dr. C.B.S. Venkataramana, Chakrabarty, and S. Adhikari. The topics Joint Secretary (I&M) and Chairman, DAE cov ered in the school and conference Official Language Implementation included quant um comput at ion and Committ ee, Sri Bijaya Bhushan Pathak, algorithms, quantum error-correction and Joint Secretary, Branch Secretariat, DAE, decoherence, quantum cryptography, Sri S.K. Malhotra, Head, Public Awareness quant um information theory, quantum Division, DAE were also present as guests entanglement, quantum games, of this function. All the Official Language relativistic aspects of quantum officials of the DAE and their Research information, quantum correlations in a and Development Sectors, Power Sectors, many-body syst em, and quant um I ndustries and Mineral Sectors, Public foundation. Eight speakers gave lectures Undertakings, Service Organisations and in t he school. The list included Prof. T. Aided Institutions and other organization Sudbery, S. Chaturvedi, G. P. Kar, of DAE were also present during this two I. Fuent es, S. Ghosh, U. Sen, P. Rungta, days conference. Various act iv it ies and G. Chappell. A total of 51 students, related to Official Language (Hindi) were including 46 students from outside carried out in this conference.

82

Prof. Shikha Varma delivering the welcome address of LOP-PSAM

Prof. Peter. A. Dowben giving the inaugural lecture on Photoemission (LOP-PSAM 2011) 83

Inaugural function of WEM-2011 : (L) Prof. M. Chakraborty, Director, IIT, Bhubaneswar; (R) Prof. P. V. Satyam, IOP

A view of participants attending the WEM-2011 meeting 84

Inaugural function of ISCQI - 2011

Group photograph of participants for ISCQI - 2011 85

Inaugural function of All Indian DAE official language conference

Predoctoral scholars of 2010 - 11 batch. 86

Snaps from 37th Foundation day programme 87

Falicitation of Professor S. N. Sahu upon his superannuation

Falicitation of Shri J. N. Dash upon his superannuation 88 89

7 OUTREACH

7.1. National Science Day 91

7.2. Visits of School students 91

7.3. Official Language Propagation 92 90

Science Modelling co-ordinated by Alumini Association

Lecture by Prof. D. Dhar, TIFR, Mumbai on the eve of Alumini Day celebration, 3rd September, 2011. 91 Outreach The Outreach Program of the 1. Talk on “Chemistry creates a Institute of Physics is aimed at spreading new world”, (in English/Oriya) by Prof. C.S. scientific awareness among common Panda, Prof. of Chemistry (Retd.), NISER. people, especially regarding v arious research activities being carried out at 2. Talk on “Hormones: Magic the Institute. T he special focus of t he molecules of the body”, (in English/Oriya) program is on school children, involving by Prof. G.B. Chainy, Executive Dir. them in v arious scientific programs to IMGENEX India Pvt. Ltd., and former Head generate their interest in basic sciences of Biotechnology Dept., Utkal Univ. and st imulat e scient ific t hinking. The Following this, student visits were program is carried out by a joint arranged, in small groups, to IOP committee of the Institute of Physics and experimental facilities, as well as the National Institute of Science Demonstration Experiments at NISER Labs. Educat ion and Research. Under t he There was enthusiast ic part icipation of outreach program, the following NISER students in arranging these programs were carried out during t he demonstrat ions (for Physics, Chemistry, past year. Mathematics, and Biology), and by IOP research scholars and scientific assistants As a part of the Outreach Program in explaining various experimental of the Institute of Physics, following facilities to school students. The program programs were carried out. ended at 5:30 p.m.

7.1 National Science Day 7.2 Visits of school students:

National Science Day was T he I nst it ute regularly receives celebrat ed at the Inst it ut e of Physics requests from various schools in Odisha during March (due to various constraints and outside for visits which are arranged of school timings and classes et c.). T his and managed under the Outreach was jointly organized by the Institute of Program. For this year following visits were Physics and National Institute of Science arranged: Education and Research, Bhubaneswar. The program was attended by about 150 1) About 76 students (class XII) from school students from Bhubaneswar (both Delhi Public School Kalinga visited IOP for English medium and Oriya medium Laboratory visits on 8th Sept. 2011. schools). About 10 students from the local 2) About 40 students from Basti participated in the program. The program started at 10:00 a.m. with Godavaris Mahavidyalaya, Banpur, following popular level talks at the Odisha, visited IOP for Laboratory visits on Institute Auditorium. 17th Jan,2012. Outreach 92 Activities related to the Official Language competitions were awarded. Prof. A. M. implementation in the institute Jayannav ar, Direct or, Shri C. B. Mishra, Registrar & Chairman, OLIC and all OLIC The Hindi Day was observed on 14.09.2011 members were present in the occasion. at the institute. On this occasion, a report Sri Braja Nath Mishra, A.D. (OL), O/o the on various activities, related to official Employees Provident Fund Commissioner, language was prepared by this Institute Odisha Region, Bbhubaneswar was during the year 2010-11 which was invited as the Chief Speaker. presented to the employees. The message issued by Dr. Srikumar Banerjee, In addition, “The World Hindi Day” Chairman, AEC was read out and was also celebrated on 10.01.2012. circulated. Institute celebrated the Hindi Capt. K. S. Noor, Principal, Sainik School, fortnight from 14.09.2011 to 28.09.2011 Bhubaneswar was invit ed as the Chief with various compet it ions among t he Speaker for this function. employees. On the valedictory function of Hindi fort night , all winners of t he

93

8 PERSONNEL

8.1. List of Institute members 95

8.2. Retirement 99 94 95 Personnel 8.1. LIST OF INSTITUTE MEMBERS A. Faculty members and their research specialisation

1. Arun M. Jayannavar 10. Snehadri B. Ota Director Reader - F Condensed Matter Physics (Theory) Condensed Matter Physics (Experiment)

2. Durga P. Mahapatra 11. Sudipta Mukherji Professor Associate Professor Condensed Matter Physics (Experiment) High Energy Physics (Theory)

3. S. M. Bhattacharjee 12. Suresh K. Patra Professor Associate Professor Condensed Matter Physics (Theory) Nuclear Physics (Theory)

4. Kalyan Kundu 13. Tapobrata Som Associate Professor Associate Professor Condensed Matter Phyiscs (Theory) Condensed Matter Physics (Experiment)

5. Shikha Varma 14. Goutam Tripathy Associate Professor Reader-F Condensed Matter Physics (Experiment) Condensed Matter Physics (Theory)

6. Ajit M. Srivastava 15. Pradip Kumar Sahu Associate Professor Reader-F High Energy Physics (Theory) Nuclear Physics (Theory)

7. Pankaj Agrawal Associate Professor B. Post-Doctoral Fellows High Energy Physics (Theory) 1. Birbikram Singh 8. Biju Raja Sekhar 2. Indranil Chakrabarty Associate Professor Condensed Matter Physics (Experiment) 3. Pallavi Debnath 4. Sudipto Muhuri 9. P. V. Satyam Associate Professor 5. Subhadip Mit ra Condensed Matter Physics (Experiment) 6. Satyabrata Adhikari 7. Bidhu Bhusan Sahu 9. Samrat Bhowmick 10. N. Revat hi Personnel 96

C. Doctoral Scholars 28. Rama Chandra Baral

1. Srikumar Sengupta 29. Sabit a Das 2. Binat a Panda 30. Subhashis Rana 3. Jim Chacko 31. Tanmoy Pal 4. Chitrasen Jena 32. Anjan Bhukta 5. Nabyendu Das 33. Arnab Ghosh 6. Trilochan Bagarti 34. Himanshu Lohani 7. Sankhadeep Chakraborty 35. Mohit Kumar 8. Rupali Kundu 36. Shailesh Kumar Singh 9. Ranjita Kumari Mohapat ra 37. Shailik Ram Joshi 10. Subrata Majumdar 38. Sk. Sazim 11. Saumia P.S. 39. Subhadip Ghosh 12. Poulomi Sadhukhan D. Pre-doctoral Scholars 13. Jatis Kumar Dash 1. Arpan Das 14. Sachin Jain 2. Subrata Kumar Biswal 15. Sourabh Lahiri 3. Soumyabrata Chatt erjee 16. Ashut osh Rath 4. Sumit Nandi 17. Ambresh Kumar Shivaji 18. Abhishek Atreya 19. Souvik Banerjee 20. Sandeep Kumar Garg

21. Jaya Maji 22. Raghavendra Rao Juluri 23. Pramita Mishra 24. Tanmoy Basu 25. Vanarajsinh J. Solanki 26. Indrani Mishra 27. Partha Bagchi 97 Personnel E. Administration 5 Jitendra Kumar Mishra 6 Bhaskar Misra 1 Sri C.B. Mishra, Registrar. 7 Chandramani Naik (i) Director’s Office: 8 Banshidhar Panigrahi 1 Sk Kefaytulla 9 Bijaya Kumar Swain 2 Raja Kumari Patra (ix) Maintenance 3 Rajesh Mohapatra 1 Pravakar Acharya 4 Bramhananda Nayak 2 Baikuntha Nath Barik 5 Rabi Narayan Sahoo 3 Purna Chandra Maharana 6 Gopal Naik 4 Patita Sahu (ii) Registrar’s Office 5 Sajendra Muduli 1 Bira Kishore Mishra 6 Pabani Bastia 2 Abhimanyu Behera 7 Rabi Narayan Mishra 3 Samarendra Das 8 Debaraj Bhuyan (iii) Establishment 9 Gangadhar Behera 1 M.V. Vanjeeswaran 10 Biswa Ranjan Behera 2 Jaya Chandra Patnaik 11 Kapilendra Pradhan 3 Bhagaban Behera (x) Estate Management 4 Prativa Choudhury 1 Sahadev Jena 5 Soubhagya Laxmi Das 2 Purasttam Jena 6 Pramod Kumar Senapati 3 Ghanashyam Naik 7 Daitary Das 4 Dhobei Behera (iv) EPABX 5 T Ramaswamy 1 Srikanta Rout 6 Gangadhar Hembram 2 Dullabha Hembram 7 Tikan Kumar Parida (v) Despatch 8 Kailash Chandra Naik 1 Krushna Chandra Sahoo 9 Banamali Pradhan (vi) Transport 10 Gokuli Chandra Dash 1 Sadananda Pradhan 11 Bijaya Kumar Das 2 Binjaban Digal 12 Babuli Naik 3 Sanatan Jena 13 Pradip Kumar Naik 4 Sarat Chandra Pradhan 14 Meena Dei 5 Umesh Chandra Pradhan 15 Sanatan Pradhan (vii) Stores 16 Bhaskara Mallick 1 Judhistira Senapati 17 Kulamani Ojha 2 Sanatan Das 18 Pitabas Barik (viii) Accounts 19 Sudhakar Pradhan 1 Ranjan Kumar Biswal 20 Dhoba Naik 2 Ambuja Kanta Biswal 21 Kailash Chandra Jena 3 Pravat Kumar Bal 22 Charana Bhoi 4 Kali Charan Tudu 23 Jatindra Nath Bastia Personnel 98 24 Martin Pradhan 8 Arun Kanta Dash 25 Rajan Kumar Biswal 9 Biswajit Mallick 26 Basanta Kumar Naik 10 Pratap Kumar Biswal (xi) Library 11 Arakhita Sahoo 1 Prafulla Kumar Senapati 12 Bala Krushna Dash 2 Dillip Kumar Chakraborty 13 Soumya Ranjan Mohanty 3 Ajita Kumari Kujur 14 Kshyama Sagar Jena 4 Duryodhan Sahoo 15 Maheswar Bailarsingh 5 Rama Chandra Hansdah 16 Nityananda Behera 6 Rabaneswar Naik 17 Purna Chandra Marandi 7 Kisan Kumar Sahoo 18 Deba Prasad Nanda (xii) Computer Centre 19 Srikanta Mishra 1 Bishnu Charan Parija 20 Rama Chandra Murmu 2 Nageswari Majhi 21 Brundaban Mohanty (xiii) Laboratory 22 Ranjan Kumar Sahoo 1 Sanjiv Kumar Sahu 23 Naba Kishore Jhankar 2 Anup Kumar Behera (xiv) Workshop 3 Sachindra Nath Sarangi 1 Ramesh Chandra Nayak 4 Khirod Kumar Patra 2 Subhabrata Tripathy 5 Madhusudan Majhi 3 Rama Kanta Nayak 6 Ramarani Dash 4 Rabi Narayan Naik 7 Santosh Kumar Choudhury

99 Personnel 8.3. RETIREMENT

(1) Prof. S. N. Sahu Date of Retirement : 31.07.2011 Date of Joining : 16.04.1991 Last post held : Professor

(2) Shri. J. N. Dash Date of Retirement : 30.06.2011 Date of Joining : 10.04.1975 Last post held : Administrative Officer (E)

(3) Mr. Basanta K. Mekap Date of Retirement : 29.02.2012 Date of Joining : 09.04.1975 Last post held : Trade-Man-C

(4) Mr. B.ijaya K. Biswal Date of Retirement : 30.04.2011 Date of Joining : 21.08.1981 Last post held : Helper - D

100 101

AUDITED STATEMENT OF 9 ACCOUNTS

9.1. Balance Sheet 103

9.2. Income & Expenditure Account 104

9.3. Receipt & Payment Account 105 102 103 Audited Statement of Accounts 9.1. BalanceSheet Audited Statement of Accounts 104 9.2.& ExpenditureAccount Income 105 Audited Statement of Accounts 9.3. Receipt & Payment Account 106 107