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dc.contributor.authorSokolewicz, Robert
dc.contributor.authorGhosh, Sumit
dc.contributor.authorYudin, Dmitry
dc.contributor.authorManchon, Aurelien
dc.contributor.authorTitov, Mikhail
dc.date.accessioned2020-01-12T12:54:15Z
dc.date.available2020-01-12T12:54:15Z
dc.date.issued2019-12-02
dc.identifier.citationSokolewicz, 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.doi10.1103/PhysRevB.100.214403
dc.identifier.urihttp://hdl.handle.net/10754/660972
dc.description.abstractRecent 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.sponsorshipThis 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.publisherAmerican Physical Society (APS)
dc.relation.urlhttps://link.aps.org/doi/10.1103/PhysRevB.100.214403
dc.relation.urlhttp://arxiv.org/pdf/1908.11354
dc.rightsArchived with thanks to Physical Review B
dc.titleSpin-orbit torques in a Rashba honeycomb antiferromagnet
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSpintronics Theory Group
dc.identifier.journalPhysical Review B
dc.eprint.versionPre-print
dc.contributor.institutionInstitute for Molecules and Materials, Radboud University Nijmegen, NL-6525 AJ Nijmegen, The Netherlands
dc.contributor.institutionPeter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany
dc.contributor.institutionSkolkovo Institute of Science and Technology, Moscow 121205, Russia
dc.contributor.institutionDepartment of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
dc.contributor.institutionDepartment of Nanophotonics and Metamaterials, ITMO University, Saint Petersburg 197101, Russia
dc.identifier.arxivid1908.11354
kaust.personGhosh, Sumit
kaust.personManchon, Aurelien


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