Alexey Kovalev
Associate Professor

310K Jorgensen Hall
402-472-2880
alexey.kovalev@unl.edu
Download recent publications here.
See Google Scholar here
Download Curriculum Vitae
Outreach/Personal
Research Interests
- Spintronics and Spincaloritronics
- Spin-Hall Effect
- Magnetoelectronics
- Spin-Transfer Torque
- Anomalous Hall Effect
- Magnetization Dynamics
- Nanoelectromechanical Systems
- Theory of Spin-Polaron in 2D Antiferromagnets
- Quantum Information Theory
Selected Talks
- "Magnetomechanical Effects in Magnetic Clusters and Molecules," 55th Conference on Magnetism and Magnetic Materials, Atlanta/Georgia, USA (invited 11/2010)
- "Macrospin Tunneling and Magnetopolaritons with Nanomechanical Interference," Seventh International Workshop on Magnetism and Superconductivity at the Nanoscale, Coma-Ruga, Spain (invited 7/2011) (see PDF)
- "Spintronics phenomena in the classical and quantum worlds," Stony Brook University (2/2012) (see PDF)
- "Improved quantum hypergraph product LDPC codes," APS March Meeting 2012 (3/2012) (see PDF)
- "Thermomagnonic spin transfer and Peltier effects in insulating magnets," APS March Meeting 2012 (invited 3/2012) (see PDF)
- "Quantum LDPC codes: hypergraph-product and related constructions," IEEE International Symposium on Information Theory (ISIT 2012) (see PDF)
- "Fault tolerance of "bad" quantum low-density parity check codes," Perimeter Institute For Theoretical Physics (10/2012) (see video)
- "Spin supercurrents and torquing with Majorana fermions," KITP UCSB (10/2013) (see link)
- "Noncollinear Antiferromagnetic Insulators as a Promising Platform for Spintronics," Online Spintronics Seminar, UNL (2/2021) (see video)
- "Towards control of spin currents in magnetic insulators", TopMax22, International Workshop at Max Planck Institute (6/2022) (see video)
Selected Publications
- A. A. Kovalev, A. Brataas, and G. E. W. Bauer, "Spin transfer in diffusive ferromagnet-normal metal systems with spin-flip scattering", Phys. Rev. B 66, 224424 (2002)
- A. A. Kovalev, G. E. W. Bauer and A. Brataas, "Current-driven ferromagnetic resonance, mechanical torques and rotary motion in magnetic nanostructures", Phys. Rev. B 75, 014430 (2007)
- A. A. Kovalev, G. E. W. Bauer and A. Brataas, "Nano-mechanical magnetization reversal", Phys. Rev. Lett. 94, 167201 (2005)
- A. A. Kovalev, K. Výborný, J. Sinova, "Hybrid skew scattering regime of the anomalous Hall effect in Rashba systems: unifying Keldysh, Boltzmann, and Kubo formalisms", Phys. Rev. B 78, 041305(R) (2008)
- A. F. Barabanov, A. A. Kovalev, O. V. Urazaev, A. M. Belemouk, "Spin-polaron excitations in the two-dimensional Kondo lattice with spin frustration", Physics Letters A 265, 221 – 224, (2000)
- A. A. Kovalev, "NANOMECHATRONICS: A new twist on a classic experiment", Nature Nanotechnology 3, 710 (2008)
- A. A. Kovalev, Y. Tserkovnyak, K. Výborný, J. Sinova, "Transport theory for disordered multiple-band systems: Anomalous Hall effect and anisotropic magnetoresistance", Phys. Rev. B 79, 195129 (2009)
- A. A. Kovalev and Y. Tserkovnyak, "Thermoelectric spin transfer in textured magnets", Phys. Rev. B 80, 100408(R) (2009)
- A. A. Kovalev and Y. Tserkovnyak, "Magnetocaloritronic nanomachines", Solid State Commun. (Special issue: Caloritronics) 150, 500 (2010)
- A. A. Kovalev, J. Sinova and Y. Tserkovnyak, "Anomalous Hall Effect in Disordered Multiband Metals", Phys. Rev. Lett. 105, 036601 (2010)
- A. A. Kovalev, L. X. Hayden, G. E. W. Bauer, Y. Tserkovnyak, "Macrospin Tunneling and Magnetopolaritons with Nanomechanical Interference", Phys. Rev. Lett. 106, 147203 (2011) (see pdf)
Group Photo, Year 2018
Group Members:
I am always looking for creative students and postdocs who are interested in theoretical condensed matter physics.
Edward SchwartzGraduate StudentJH 248A Jorgensen Hall |
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Hamed VakiliPostdoctoral AssociateJH 310S Jorgensen Hall |
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Former Group Members: | |
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Shane Sandhoefner, Data Scientist at Carson Group |
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Bo Li, Postdoctoral Researcher, Institute for Advanced Study, Tsinghua University, China |
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Vladimir Zyuzin, Postdoctoral Researcher at Texas A&M |
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Utkan Güngördü, Postdoctoral Researcher at University of Maryland, Baltimore County |
Sanjay Prabhakar, Postdoctoral Researcher, Georgia State University-Atlanta | |
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Rabindra Nepal, Senior Scientist at Zoetis Inc. |
Aldo Raeliarijaona, Postdoctoral Fellow - Carnegie Institution for Science |
News:
Magnetic skyrmions unwrapped, News and Views, Nature Physics
Majorana bound states with chiral magnetic textures, Journal of Applied Physics
Bo Li gave invited talk at March Meeting 2022
Congratulations to Shane Sandhoefner for recieving his PhD!!!
Congratulations to Bo Li for recieving his PhD!!!
Our paper in Physical Review Letters:
Magnon Landau Levels and Spin Responses in Antiferromagnets
Bo Li and Alexey A. Kovalev
Phys. Rev. Lett. 125, 257201 (2020) – Published 14 December 2020
Our paper in PRB Editors' Suggestion:
Magnetoelectric control of topological phases in graphene
Hiroyuki Takenaka, Shane Sandhoefner, Alexey A. Kovalev, and Evgeny Y. Tsymbal
Phys. Rev. B 100, 125156 (2019) – Published 25 September 2019
Our paper in March Kaleidoscope:
Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p-n junction
Sanjay Prabhakar, Rabindra Nepal, Roderick Melnik, and Alexey A. Kovalev
Phys. Rev. B 99, 094111 (2019) - Published 27 March 2019
Other publication updates:
First-principles calculation of spin-orbit torque in a Co/Pt bilayer
K. D. Belashchenko, Alexey A. Kovalev, and M. van Schilfgaarde
Phys. Rev. Materials 3, 011401(R) (2019) - Published 29 January 2019
Boundary twists, instabilities, and creation of skyrmions and antiskyrmions
Aldo Raeliarijaona, Rabindra Nepal, and Alexey A. Kovalev
Phys. Rev. Materials 2, 124401 (2018) - Published 17 December 2018