Curriculum Vitae Jacob Gayles

CONTACT Assistant Professor INFORMATION University of South Florida Department of Physics 4202 East Fowler Ave, ISA 6217 Tampa, FL FL 33620-7100 USA

Ph.D. Physics Texas A&M University Work: +1 813-974-9930 Department of Physics & Astronomy E-mail: [email protected] College Station, TX 77843-4242

RESEARCH Spin-orbit Effects, First Principle Calculations, Spin-Transport, Non-Trivial Magnetism, 2-D INTERESTS Systems, Hall Effects, Berry Phase Physics, Skyrmions, Magnetic Exchange Interactions, Weyl Semimetals, Transitions in Magnetic Systems, Magneto-Optics, Kubo Formalism, Boltzmann Transport, Non-equilibrium Green Functions, Tight-Binding models

ACADEMIC Assistant Professor, USF Department of Physics Jan 2020 to present APPOINTMENTS − Spintronics − Antiskyrmions − Weyl Semimetals, Topology − Anomalous and Topological Hall effect in non-trivial magnetic systems − First Principle calculations of the Dzyaloshinskii-Moriya Interaction − Half-Heuslers Research Scientist, Max Planck Institut Jan 2017 to 2020 Theory Topology • Supervisor: Claudia Felser • Group Leader- Skyrmionics 2019 to 2020 − Spintronics − Antiskyrmions − Weyl Semimetals, Topology − Anomalous and Topological Hall effect in non-trivial magnetic systems − First Principle calculations of the Dzyaloshinskii-Moriya Interaction − Half-Heuslers Graduate Research Assistant, Johannes Gutenberg Universität Mainz Jan 2015 to Dec 2016 INSPIRE GROUP • Supervisor: Jairo Sinova − Spintronics − Spin-orbit torques using Scattering Approach − Anomalous and Topological Hall effect in non-trivial magnetic systems − First Principle calculations of the Dzyaloshinskii-Moriya Interaction − First Principle calculations of B20 compounds, Half-Heuslers, Graphene, and Stanene Graduate Research Assistant, Forschungszentrum Jülich Summer 2013 Prof. Mokoursov Topological Group − Helicity and size dependence of skyrmions in B20 compounds

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Graduate Research Assistant, Institute of Physics, Academy of Sciences Czech Republic Summer 2012 Prof. Tomas Jungwirth − Anomalous Hall effect in 2D multi-band systems with strong disorder Graduate Student Researcher, Texas A&M University August 2011 to Dec 2016 Department of Physics & Astronomy • Supervisor: Jairo Sinova • Supervisor: Artem Abanov Undergraduate Student Researcher, California State University Northridge January 2007 to August 2011 Department of Physics & Astronomy • National Science Foundation PREM Center • W.M. Keck Computational Materials Theory Center • Supervisor (PI): Professor Nicholas Kioussis • co-Supervisor (co-PI): Professor Donna Sheng − Transferable Tight-Binding parameters for CdTe (2011) − Transport Properties of DNA Base Pairs-Prof. Nick Kioussis (2009-2011) − Fe/BaTiO3/Fe Tunnel Junctions-Prof. Nick Kioussis (2009) REU, Princeton Center for Complex Materials Summer 2007, 2008, 2009 − Fe/BaTiO3/Fe Tunnel Junctions -Prof. Emily Carter & Prof. Nick Kioussis (2009) − Nonlinear Optics in Nonlocal Material-Prof. Jason Fleischer (2008) − Polymer Electrolyte Membrane Fuel Cell Optimization-Prof. Jay Benziger (2007)

EDUCATION Texas A&M University, College Station, TX

Ph.D., Department of Physics & Astronomy, December 2016 • Thesis Topic: Dzyaloshinkii-Moriya Interaction and Hall Effects in Bulk Chiral Magnets from First Principle Calculations • Advisor: Professor Jairo Sinova, Professor Artem Abanov • Area of Study: Spintronics

California State University Northridge, Northridge, CA

B.Sc. Department of Physics & Astronomy, May 2011 • Advisor: Professor Nicholas Kioussis • Area of Study: Solid State Physics

JOURNAL [1] Shuo-Ying Yang, Yaojia Wang, Brenden Ortiz, Jacob Gayles, Elena Derunova, Libor Smejkal, PUBLICATIONS Stuart S. P. Parkin, Stephen Wilson, Tyrel McQueen, Mazhar N. Ali. Giant extrinsic anoma- lous Hall effect in the Kagome, Antimonide, KV3Sb5. Science Advances 31 Jul 2020: Vol. 6, no. 31, eabb6003

[2] Shuo-Ying Yang, Jonathan Noky, Jacob Gayles, Fasil Kidane Dejene, Yan Sun, Enke Liu, Mazhar Nawaz Ali, Claudia Felser, and Stuart S. P. Parkin. Probing the origin of the planar Hall effect in Co3Sn2S2 nanoflakes. In review Nano Letters.

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[3] Lukas Muechler, Enke Liu, Jacob Gayles, Qiunan Xu, Claudia Felser, and Yan Sun.Emerging chiral edge states from the confinement of a magnetic Weyl semimetal in Co3Sn2S2. Physical Review B 101 (11), 115106.

[4] Jacob Gayles, Hao Yang, Yan Sun, Claudia Felser, and Stuart Parkin. Distinct Antiskyrmion textures in Mn2RhSn induced by strain. In preparation for PRL. [5] Nitesh Kumar, Neetu Rani, Jacob Gayles, Praveen Vir, Satya S. Guin, Yan Sun, Claudia Felser, Chandra Shekhar. Giant anomalous Hall effect in the flatband magnetic metals RCrSb3. In review Advanced Materials.

[6] Gyu-Hyeon Park, Helena Reichlova, Richard Schlitz, Michaela Lammel, Anastasios Markou, Peter Swekis, Philipp Ritzinger, Dominik Kriegner, Jonathan Noky, Jacob Gayles, Yan Sun, Claudia Felser, Kornelius Nielsch, Sebastian T. B. Goennenwein, Andy Thomas. Thick- ness dependence of the anomalous Nernst effect and the Mott relation of Weyl-semimetal Co2MnGa thin films. Phys. Rev. B 101, 060406(R) (2020). doi:doi.org/10.1103/PhysRevB.101.060406.

[7] Vivek Kumar, Nitesh Kumar, Manfred Reehuis, Jacob Gayles, Alexandr Sukhanov, Andreas Hoser, Ajaya K. Nayak, Chandra Shekhar, Peter Adler, and Claudia Felser. Tuning the topological Hall effect in the antiskyrmion hosting Heusler compounds. Phys. Rev. B 101, 014424 (2020). doi:doi.org/10.1103/PhysRevB.101.014424. Lead Theorist

[8] Benedikt Ernst, Roshnee Sahoo„ Yan Sun, Jayita Nayak, Lukas M§chler, Ajaya K. Nayak, Nitesh Kumar, Jacob Gayles, Anastasios Markou, Gerhard H. Fecher, and Claudia Felser. Anomalous Hall effect and the role of Berry curvature in Co2TiSn Heusler films. Phys. Rev. B 100, 054445 (2019). doi:doi.org/10.1103/PhysRevB.100.054445

[9] Anastasios Markou, Dominik Kriegner, Jacob Gayles, Liguo Zhang, Yi-Cheng Chen, Benedikt Ernst, Yu-Hong Lai, Walter Schnelle, Ying-Hao Chu, Yan Sun, and Claudia Felser. Thick- ness dependence of the anomalous Hall effect in thin films of the topological semimetal Co2MnGa. Phys. Rev. B 100, 054422 (2019). doi:doi.org/10.1103/PhysRevB.100.054422

[10] Richard Schlitz, Peter Swekis, Anastasios Markou, Jacob Gayles, Helena Reichlova, Michaela Lammel, Andy Thomas, Kornelius Nielsch, Claudia Felser, and Sebastian T. B. Goennen- wein. All Electrical Access to Topological Transport Features in Mn1.8PtSn Films. Nano Lett., 2019, 19 (4), pp 2366-2370. Lead Theorist doi:10.1021/acs.nanolett.8b05042

[11] Praveen Vir, Jacob Gayles, A. S. Sukhanov, Nitesh Kumar, Francoise Damay, Yan Sun, Jürgen Kübler, Chandra Shekhar, and Claudia Felser. Anisotropic topological Hall effect in the antiskrymion hosting Heusler compound Mn1.4PtSn. Phys. Rev. B 99, 140406(R). Lead Theorist, Corresponding Author doi:doi.org/10.1103/PhysRevB.99.140406

[12] Peter Swekis, Anastasios Markou, Dominik Kriegner, Jacob Gayles, Richard Schlitz, Walter Schnelle, Sebastian T. B. Goennenwein, Claudia Felser. Topological Hall effect in thin films of Mn1.5PtSn. arXiv:1810.08232 (2018). Phys. Rev. Materials 3, 013001(R) (2019). Lead Theorist doi:doi.org/10.1103/PhysRevMaterials.3.013001

[13] Jacob Gayles, Jonathan Noky, Claudia Felser, Yan Sun. Topological Contributions to the Anomalous Nernst and Hall Effect in the Chiral Double-Helimagnetic System. arXiv:1805.02976 (2018). In review Physical Review Materials.

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[14] Qiunan Xu, Enke Liu, Wujun Shi, Lukas Muechler, Jacob Gayles, Claudia Felser, Yan Sun. Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2. Phys. Rev. B 97, 235416 (2018). doi:doi.org/10.1103/PhysRevB.97.235416

[15] Jonathan Noky, Jacob Gayles, Claudia Felser, Yan Sun. Strong anomalous Nernst effect in collinear magnetic Weyl semimetals without net magnetic moments. Phys. Rev. B 97, 220405 (2018). Rapid Communication doi:doi.org/10.1103/PhysRevB.97.220405

[16] G. Bihlmayer, P. M. Buhl, B. Dupe, I. L. Fernandes, F. Freimuth, J. Gayles, S. Heinze, N. Kiselev, S. Lounis, Y. Mokrousov, and S. Blügel. Magnetic skyrmions: structure, stability, and transport phenomena. Ψ-k Scientific Highlight of the Month no 139 (2018).

[17] Charles S. Spencer, Jacob Gayles, Nicholas A. Porter, Satoshi Sugimoto, Zabeada Aslam, Christian J. Kinane, Timothy R. Charlton, Frank Freimuth, Stanislav Chadov, Sean Lan- gridge, Jairo Sinova, Claudia Felser, Yuriy Mokrousov, Stefan Blügel, Christopher H. Mar- rows. Helical magnetic structure and the anomalous and topological Hall effects in epitaxial B20 Fe1−yCoyGe films. Phys. Rev. B 97, 214406 (2018).. Lead Theorist doi:doi.org/10.1103/PhysRevB.97.214406

[18] . Ciccarelli, L. Anderson, A. J. Ferguson, C. Gould, J. Gayles, J. Zelezny, L. Smejkal, Y. Zhe, J. Sinova, F. Freimuth, and T. Jungwirth. Room-temperature spin-orbit torque in NiMnSb. Nature physics 12 (9), 855 (2016). doi:doi:10.1038/nphys3772

[19] J. Gayles, F. Freimuth, T. Schena, G. Lani, P. Mavropoulos, R. A. Duine, S. Blügel, J. Sinova, and Y. Mokrousov. Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn1−xFexGe. Phys. Rev. Lett. 115, 036602. Editor’s Suggestion doi:10.1103/PhysRevLett.115.036602

[20] Luis A Agapito, Jacob Gayles, Christian Wolowiec and Nicholas Kioussis. Aviram–Ratner rec- tifying mechanism for DNA base-pair sequencing through graphene nanogaps. Nanotech- nology, 23 (13), 135202 (2012). doi:10.1088/0957-4484/23/13/135202

[21] Jin Li , Jacob Gayles, Nicholas Kioussis, Z. Zhang, C. Grein, F. Aqariden. Ab initio Studies of the Unreconstructed Polar CdTe (111) Surface. J. Electron. Mater. 41, 2745–2753 (2012). doi:10.1007/s11664-012-1924-x

[22] Jin Li, A. Ciani, J. Gayles, D. A. Papaconstantopoulos, Nicholas Kioussis, C. Grein, and F. Aqariden. Non-orthogonal Tight-Binding Model for Tellurium and Selenium. Philosophical Magazine 93 (23), 3216-3230 (2013). doi:10.1080/14786435.2013.801569

PROPOSALS [1] International Max Planck Research School for Chemistry and Physics of Quantum Materials One year funding for two PhD students. Wrote the proposal

[2] SPP2137 Skyrmionics In charge of yearly reports and attending management meetings.

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[3] SKYTOP (Skyrmion-Topological insulator and Weyl semimetal technology) In charge of yearly reports and attending management meetings.

[4] Transregional Collaborative Research Center (SFB/TRR) 173 Spin+X Assisted in writing the- ory projects.

CONFERENCE [1] Skyrmionics Workshop for Young Researcher, Mainz, Germany, September 17th-20th 2019 ORGANIZED

[2] PhD SpinCaT Workshop-New Perspectives for Spin-Caloritronics, Mainz, Germany, August 18th-19th 2016

CONFERENCE [1] Berry Phase and Exchange Contributions in Antiskyrmion Hosting Heusler Compound Mn1.5XY. TALKS In: American Physical Society March Meeting, Boston, MA, March, 2019.

[2] Dzyaloshinkii-Moriya Interaction and Hall Effects in Disordered Bulk Chiral Magnets From First Principle Calculations. In: Deutsche Physikalische Gesellschaft Spring Meeting, Dres- den, Germany, March, 2017.

[3] Bulk Spin-orbit Torques at finite temperatures in Bulk Half-Metallic Heuslers from First Prin- ciple. In: Deutsche Physikalische Gesellschaft Spring Meeting, Regensburg, Germany, March, 2016.

[4] Helicity and size dependence of Skyrmions in Mn1−xFexGe mediated by the Dzyaloshinskii- Moriya interaction. In: American Physical Society March Meeting, Denver, CO, March, 2014. Session Chair

[5] Inelastic process at finite temperature in 2D multi-band systems. In: American Physical Society March Meeting, Baltimore, MD, March, 2013.

[6] Anomalous Hall effect in the Presence of Strong Spin-orbit Coupling and Non-trivial Magne- tization. In: American Physical Society March Meeting, Boston, MA, March, 2012.

[7] Methods for Calculating Transport Properties of DNA Base Pairs Coupled to Graphene Nano- Ribbons. In: Conference for African American Researchers in the Mathematical Sciences 16, Baltimore, MD, June, 2010.

INVITED TALKS [1] Distinct topological magnetic textures in Antiskyrmion hosting Heusler compounds MnxYZ with different Berry curvature responses, Topomagnetism Is Coming: Relativity and Corre- lations in Topological Magnets, Mainz, DE September 30, 2019.

[2] Transverse Transport in Topological Magnetic Materials, CAARMS 24 Institute for Advanced Studies, USA, July 11-14, 2018.

[3] Dzyaloshinkii-Moriya Interaction and Hall Effects in Disordered Bulk Chiral Magnets From First Principle Calculations, University of Texas Austin Macdonald Group, USA, May 9, 2017.

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[4] Spin-orbit Effects in Inversion Asymmetric Bulk Systems from First Principle Calculations, Institut für Theoretische Physik Goethe-Universit¨t Condensed Matter Theory, Frankfurt am Main, Dec 8, 2016.

[5] Ab-initio calculations of the Dzyaloshinskii-Moriya interaction and transport in Exotic Mag- netic Systems, Max Plank Institute for Chemical Physics of Solids, Dresden, May 20, 2015.

[6] Helicity and size dependence of skyrmions in Mn1−xFexGe mediated by the Dzyaloshinskii- Moriya interaction, California State University Northridge, April 24, 2014.

[7] Helicity and size dependence of skyrmions in Mn1−xFexGe mediated by the Dzyaloshinskii- Moriya interaction, Forschungszentrum Jülich, August 21, 2013.

TALKS [1] Calculating Transport Properties of DNA Base Pairs Coupled to Graphene Nano-Ribbons In: NSF Reverse Site Vist, Washington D.C, April, 2011.

[2] Methods for Calculating Transport Properties of DNA Base Pairs Coupled to Graphene Nano- Ribbons In: First Annual McNair Symposium at CSU Northridge, Northridge, CA, 2011.

[3] Electric Field Control of Magnetism in Fe/BaTiO3/Fe Tunnel Junctions In: 13th Annual Stu- dent Research & Creative Works Symposium, Northridge, CA, 2009.

[4] Polymer Electrolyte Membrane Fuel Cell Optimization In: Sigma Xi Student Research Sympo- sium,Northridge, CA, 2009.

[5] Fe/BaTiO3/Fe Tunnel Junctions In: NSF Site Visit, Northridge, CA, April, 2009.

[6] Polymer Electrolyte Membrane Fuel Cell Optimization In: 12th Annual Student Research & Creative Works Symposium, Northridge, CA, 2007.

CONFERENCE [1] Helical magnetic structure and the anomalous and topological Hall effects in B20 FeCoGe. POSTERS In: 658. WE-Heraeus Seminar on "Spins out of equilibrium: Manipulating and detecting quantum magnets", Bad Honnef, Germany, Jan, 2018.

[2] Spin-orbit Effects in Inversion Asymmetric Bulk Systems from First Principle Calculations. In: 633. WE-Heraeus-Seminar on ÒSpin-orbit DynamicsÓ, Bad Honnef, Germany, Jan, 2017.

[3] Spin-rrbit effects in Exotic 2-D Anti-Ferromagnetic Materials with Non-Collinear Spin. In: In- ternational Workshop : Spintronics with Antiferromagnets, Tohoku, Japan, November, 2015.

[4] Spin-orbit Torques in Half-Heuslers. In: Ψ-K 2015 Conference, San Sebastian, Spain, Septem- ber, 2015.

[5] Transferable Tight-Binding parameters for CdTe. In: DTRA Basic Research Technical Review, Springfield, VA, July, 2011.

[6] Transferable Tight-Binding parameters for CdTe. In: Conference for African American Re- searchers in the Mathematical Sciences 17, Los Angeles, CA, June, 2011.

[7] Methods for Calculating Transport Properties of DNA Base Pairs Coupled to Graphene Nano- Ribbons. In: PREM+ MRSEC PIs Joint Meeting, Humacao, PR, March, 2011.

[8] A DFT look at transport properties of Graphene nano-ribbons coupled to DNA Base pairs. In: American Physical Society March Meeting, Portland, OR, March, 2010.

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ACADEMIC Spin Phenomena Interdisciplinary Center at JGU SERVICE 2014-2016 − Organization and Planning − Camera operations − Website management

Discover Enjoy and Explore Physics and Engineering at TAMU Graduate Student Mentor. 2012, 2013, 2014. − Organization and Planning − Developed physics demos for classrooms − Mentor 4-6 undergraduate student in developing physics demos

Texas A&M Physics Festival at TAMU Volunteer. 2012, 2013, 2014. − Organization and Planning − Developed physics demos for classrooms

Texas A&M Physics Show at TAMU Lead 2013-2014. − Weekly demonstration of physics demos to generate public interest in physics − Organization and Planning − Presented physics demos for K–12 students

Condensed Matter Journal Club at TAMU 5 hrs/week. 2009, 2010. − Present and discuss recent literature − Organize and lead meetings

Physics & Astronomy Department Tutor at CSU Northridge 5 hrs/week. 2009, 2010. − Assist undergraduate physics and non-physics students in physics, math and chemistry

Mathnaisium Northridge & Woodland Hills, CA 2006,2007 − Tutor K-12 students in math − Train and tutor students in math for SAT − Oversee large groups of pre-college students

STUDENT Praveen Vir 2017- MENTORING Ph.D. at MPI Dresden, Antiskyrmions in single Heuslers Primary advisor: Prof. Dr. Clau- dia Felser

Peter Swekis 2018- Ph.D. at MPI Dresden, Antiskyrmions in thin-film Heuslers Primary advisor: Prof. Dr. Claudia Felser.

Vivek Kumar 2018-2019 Ph.D. at MPI Dresden, Antiskyrmions in polycrystalline Heuslers Primary advisor: Prof. Dr. Claudia Felser. Now: PostDoc at Technical University Munich.

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Krishna Choudary 2009 High School Student Intern at CSU Northridge, Case study of the Lennard Jones Potential Primary advisor: Prof. Nicholas Kioussis. Now: Graduate Student in Physics at UCLA.

TEACHING Texas A&M University, College Station, TX Spring 2013 EXPERIENCE Supervisor: Dr. Tatiana Erukhimova & Prof. Jairo Sinova

Student Assistant • PHYS 208: Electricity and Magnetism • Undergraduate course for engineers and science majors • Main instructor: Dr. Tatiana Erukhimova • Textbook: “Don’t Panic: Volume II”, by William H. Bassichis, 5th Edition

PROFESSIONAL • Sigma Pi Sigma Honor Society MEMBERSHIPS • American Physical Society • Society of Physics Students

WORKSHOPS • Spin-orbit Coupling and Spin Mechanics, Mainz, DE, 2015. − Attendee • SPICE-Workshop on Modern Methods in Materials Science, Mainz, DE, 2014. − Attendee • NewSpin2 Conference, College Station, TX, 2011. − Organization and Planning • Providence High School Visit, Northridge CA, 2011. − Organization and Planning − Lecture Research in Material Science • Nanotechnology Workshop for High School Teachers, Northridge, CA, 2008, 2010, 2014. − Organization and Planning − Setup and present demos • ATK Training Workshop Stanford, CA, 25-26 February, 2010. − Atomistix simulation package hands on tutorial − of large scale atomic systems − Building desktop computers for atomistic simulations • Granada Hills Charter High School Visit, Northridge CA, 2009. − Organization and Planning − Lecture Research in Material Science • Computational Science Workshop for Underrepresented Groups, USC, CA, 2008. − Hands on experience in parallel computing from basic components − Presented Transverse Transport of DNA Base Across a Graphene Nano-gap

HARDWARE AND Condensed Matter Software: SOFTWARE • FLEUR SKILLS • KWANT • VAMPIRE • Vienna Ab-initio Simulation Package • STUTTGART TB-LMTO program

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• Atomistix Simulation Package (QuantumWise) • Spanish Initiative for Electronic Simulations with Thousands of Atoms/ Trans-Siesta • DoD Parallel Tight-Binding Software: • Blender • Matlab • Microsoft Office package (Word, PowerPoint, Excel) • Visual Molecular Dynamics

HONORSAND • Spin+X SFB/TRR 173 PhD Fellow (2016) AWARDS • DEEP Mentor Award (2012,2013,2014) • Center for Teaching Excellence STEM Teaching (2013) • LSAMP Bridge to the Doctorate Fellow (2011) • IGERT Fellow (2011) • John W. Nagle Outstanding Senior Award (2011) • McNair Scholar (2010/2011) • Educational Opportunity Program Academic Excellence Grant (2007, 2008, 2009, 2010) • Louis Stokes Alliances for Minority Participation (LSAMP) Scholar (2008/2009) • Academic Competitiveness Grant (2006-2007)

JOURNAL • Nature Scientific Reports REVIEWS • Physical Review Letters and PRB • Applied Physics Letters

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