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dc.contributor.authorNdiaye, Papa Birame
dc.contributor.authorAkosa, Collins Ashu
dc.contributor.authorFischer, M. H.
dc.contributor.authorVaezi, A.
dc.contributor.authorKim, E.-A.
dc.contributor.authorManchon, Aurelien
dc.date.accessioned2017-07-26T06:19:09Z
dc.date.available2017-07-26T06:19:09Z
dc.date.issued2017-07-07
dc.identifier.citationNdiaye PB, Akosa CA, Fischer MH, Vaezi A, Kim E-A, et al. (2017) Dirac spin-orbit torques and charge pumping at the surface of topological insulators. Physical Review B 96. Available: http://dx.doi.org/10.1103/PhysRevB.96.014408.
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.doi10.1103/PhysRevB.96.014408
dc.identifier.urihttp://hdl.handle.net/10754/625249
dc.description.abstractWe address the nature of spin-orbit torques at the magnetic surfaces of topological insulators using the linear-response theory. We find that the so-called Dirac torques in such systems possess a different symmetry compared to their Rashba counterpart, as well as a high anisotropy as a function of the magnetization direction. In particular, the damping torque vanishes when the magnetization lies in the plane of the topological-insulator surface. We also show that the Onsager reciprocal of the spin-orbit torque, the charge pumping, induces an enhanced anisotropic damping. Via a macrospin model, we numerically demonstrate that these features have important consequences in terms of magnetization switching.
dc.description.sponsorshipP.B.N. and A.M. were supported by the King Abdullah University of Science and Technology (KAUST). P.B.N. thanks Z. T. Ndiaye for the fruitful discussions and valuable technical support, and A.M. acknowledges inspiring discussions with H. Yang, E. Y. Tsymbal, and J. Zhang. E.-A. K. was supported by NSF CAREER Award No. DMR-0955822 and by the Cornell Center for Materials Research with funding from the NSF MRSEC program (Grant No. DMR-1120296). M.H.F. acknowledges support from the Swiss Society of Friends of the Weizmann Institute of Science.
dc.publisherAmerican Physical Society (APS)
dc.relation.urlhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.014408
dc.rightsArchived with thanks to Physical Review B
dc.titleDirac spin-orbit torques and charge pumping at the surface of topological insulators
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalPhysical Review B
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
dc.contributor.institutionDepartment of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
dc.contributor.institutionInstitute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland
dc.contributor.institutionDepartment of Physics, Stanford University, Stanford, California 94305, USA
dc.contributor.institutionDepartment of Physics, Cornell University, Ithaca, New York 14853, USA
dc.identifier.arxividarXiv:1509.06929
kaust.personNdiaye, Papa Birame
kaust.personAkosa, Collins Ashu
kaust.personManchon, Aurelien
kaust.personManchon, Aurelien
refterms.dateFOA2018-06-14T05:06:38Z


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