Dirac spin-orbit torques and charge pumping at the surface of topological insulators

Handle URI:
http://hdl.handle.net/10754/625249
Title:
Dirac spin-orbit torques and charge pumping at the surface of topological insulators
Authors:
Ndiaye, Papa B.; Akosa, C. A.; Fischer, M. H.; Vaezi, A.; Kim, E.-A.; Manchon, Aurelien ( 0000-0002-4768-293X )
Abstract:
We 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.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Ndiaye 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.
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
7-Jul-2017
DOI:
10.1103/PhysRevB.96.014408
Type:
Article
ISSN:
2469-9950; 2469-9969
Sponsors:
P.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.
Additional Links:
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.014408
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorNdiaye, Papa B.en
dc.contributor.authorAkosa, C. A.en
dc.contributor.authorFischer, M. H.en
dc.contributor.authorVaezi, A.en
dc.contributor.authorKim, E.-A.en
dc.contributor.authorManchon, Aurelienen
dc.date.accessioned2017-07-26T06:19:09Z-
dc.date.available2017-07-26T06:19:09Z-
dc.date.issued2017-07-07en
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.en
dc.identifier.issn2469-9950en
dc.identifier.issn2469-9969en
dc.identifier.doi10.1103/PhysRevB.96.014408en
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.en
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.en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.014408en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleDirac spin-orbit torques and charge pumping at the surface of topological insulatorsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japanen
dc.contributor.institutionDepartment of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israelen
dc.contributor.institutionInstitute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerlanden
dc.contributor.institutionDepartment of Physics, Stanford University, Stanford, California 94305, USAen
dc.contributor.institutionDepartment of Physics, Cornell University, Ithaca, New York 14853, USAen
kaust.authorNdiaye, Papa B.en
kaust.authorAkosa, C. A.en
kaust.authorManchon, Aurelienen
kaust.authorManchon, Aurelienen
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