Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion

Handle URI:
http://hdl.handle.net/10754/626558
Title:
Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion
Authors:
Akosa, Collins Ashu ( 0000-0002-5367-9972 ) ; Tretiakov, O. A.; Tatara, G.; Manchon, Aurelien ( 0000-0002-4768-293X )
Abstract:
We demonstrate that the nontrivial magnetic texture of antiferromagnetic skyrmions (AFM-Sks) promotes a non-vanishing topological spin Hall effect (TSHE) on the flowing electrons. This results in a substantial enhancement of the non-adiabatic torque and hence improves the skyrmion mobility. This non-adiabatic torque increases when decreasing the skyrmion size, and therefore scaling down results in a much higher torque efficiency. In clean AFM-Sks, we find a significant boost of the TSHE close to van Hove singularity. Interestingly, this effect is enhanced away from the band gap in the presence of non-magnetic interstitial defects. Furthermore, unlike their ferromagnetic counterpart, TSHE in AFM-Sks increases with increase in disorder strength thus opening promising avenues for materials engineering of this effect.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
arXiv
Issue Date:
9-Sep-2017
ARXIV:
arXiv:1709.02931
Type:
Preprint
Additional Links:
http://arxiv.org/abs/1709.02931v1; http://arxiv.org/pdf/1709.02931v1
Appears in Collections:
Other/General Submission; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAkosa, Collins Ashuen
dc.contributor.authorTretiakov, O. A.en
dc.contributor.authorTatara, G.en
dc.contributor.authorManchon, Aurelienen
dc.date.accessioned2017-12-28T07:32:16Z-
dc.date.available2017-12-28T07:32:16Z-
dc.date.issued2017-09-09en
dc.identifier.urihttp://hdl.handle.net/10754/626558-
dc.description.abstractWe demonstrate that the nontrivial magnetic texture of antiferromagnetic skyrmions (AFM-Sks) promotes a non-vanishing topological spin Hall effect (TSHE) on the flowing electrons. This results in a substantial enhancement of the non-adiabatic torque and hence improves the skyrmion mobility. This non-adiabatic torque increases when decreasing the skyrmion size, and therefore scaling down results in a much higher torque efficiency. In clean AFM-Sks, we find a significant boost of the TSHE close to van Hove singularity. Interestingly, this effect is enhanced away from the band gap in the presence of non-magnetic interstitial defects. Furthermore, unlike their ferromagnetic counterpart, TSHE in AFM-Sks increases with increase in disorder strength thus opening promising avenues for materials engineering of this effect.en
dc.publisherarXiven
dc.relation.urlhttp://arxiv.org/abs/1709.02931v1en
dc.relation.urlhttp://arxiv.org/pdf/1709.02931v1en
dc.rightsArchived with thanks to arXiven
dc.titleTheory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motionen
dc.typePreprinten
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.eprint.versionPre-printen
dc.contributor.institutionRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japanen
dc.contributor.institutionInstitute for Materials Research, Tohoku University, Sendai 980-8577, Japanen
dc.identifier.arxividarXiv:1709.02931en
kaust.authorAkosa, Collins Ashuen
kaust.authorManchon, Aurelienen
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