Spin-orbit torques in a Rashba honeycomb antiferromagnet
dc.contributor.author | Sokolewicz, Robert | |
dc.contributor.author | Ghosh, Sumit | |
dc.contributor.author | Yudin, Dmitry | |
dc.contributor.author | Manchon, Aurelien | |
dc.contributor.author | Titov, Mikhail | |
dc.date.accessioned | 2020-01-12T12:54:15Z | |
dc.date.available | 2020-01-12T12:54:15Z | |
dc.date.issued | 2019-12-02 | |
dc.identifier.citation | Sokolewicz, R., Ghosh, S., Yudin, D., Manchon, A., & Titov, M. (2019). Spin-orbit torques in a Rashba honeycomb antiferromagnet. Physical Review B, 100(21). doi:10.1103/physrevb.100.214403 | |
dc.identifier.doi | 10.1103/PhysRevB.100.214403 | |
dc.identifier.uri | http://hdl.handle.net/10754/660972 | |
dc.description.abstract | Recent experiments on switching antiferromagnetic domains by electric current pulses have attracted a lot of attention to spin-orbit torques in antiferromagnets. In this work, we employ the tight-binding model solver, kwant, to compute spin-orbit torques in a two-dimensional antiferromagnet on a honeycomb lattice with strong spin-orbit interaction of Rashba type. Our model combines spin-orbit interaction, local s-d-like exchange, and scattering of conduction electrons on on-site disorder potential to provide a microscopic mechanism for angular-momentum relaxation. We consider two versions of the model: One with preserved and one with broken sublattice symmetry. A nonequilibrium staggered polarization that is responsible for the so-called Neél spin-orbit torque is shown to vanish identically in the symmetric model but may become finite if sublattice symmetry is broken. Similarly, antidamping spin-orbit torques vanish in the symmetric model but become finite and anisotropic in a model with broken sublattice symmetry. As expected, antidamping torques also reveal a sizable dependence on impurity concentration. Our numerical analysis also confirms symmetry classification of spin-orbit torques and strong torque anisotropy due to in-plane confinement of electron momenta. | |
dc.description.sponsorship | This research was supported by the JTC-FLAGERA Project GRANSPORT. D.Y. and M.T. acknowledge the support from the Russian Science Foundation Project No. 17-12- 01359. The work of D.Y. was also supported by the Swedish Research Council (Vetenskapsrådet, 2018-04383). A.M. and S.G. were supported by the King Abdullah University of Science and Technology (KAUST). | |
dc.publisher | American Physical Society (APS) | |
dc.relation.url | https://link.aps.org/doi/10.1103/PhysRevB.100.214403 | |
dc.relation.url | http://arxiv.org/pdf/1908.11354 | |
dc.rights | Archived with thanks to Physical Review B | |
dc.title | Spin-orbit torques in a Rashba honeycomb antiferromagnet | |
dc.type | Article | |
dc.contributor.department | Material Science and Engineering Program | |
dc.contributor.department | Physical Science and Engineering (PSE) Division | |
dc.contributor.department | Spintronics Theory Group | |
dc.identifier.journal | Physical Review B | |
dc.eprint.version | Pre-print | |
dc.contributor.institution | Institute for Molecules and Materials, Radboud University Nijmegen, NL-6525 AJ Nijmegen, The Netherlands | |
dc.contributor.institution | Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany | |
dc.contributor.institution | Skolkovo Institute of Science and Technology, Moscow 121205, Russia | |
dc.contributor.institution | Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden | |
dc.contributor.institution | Department of Nanophotonics and Metamaterials, ITMO University, Saint Petersburg 197101, Russia | |
dc.identifier.arxivid | arXiv:1908.11354 | |
kaust.person | Ghosh, Sumit | |
kaust.person | Manchon, Aurelien |
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