Valley-dependent spin-orbit torques in two-dimensional hexagonal crystals

Handle URI:
http://hdl.handle.net/10754/593663
Title:
Valley-dependent spin-orbit torques in two-dimensional hexagonal crystals
Authors:
Li, Hang; Wang, Xuhui; Manchon, Aurelien ( 0000-0002-4768-293X )
Abstract:
We study spin-orbit torques in two-dimensional hexagonal crystals such as graphene, silicene, germanene, and stanene. The torque possesses two components, a fieldlike term due to inverse spin galvanic effect and an antidamping torque originating from Berry curvature in mixed spin-k space. In the presence of staggered potential and exchange field, the valley degeneracy can be lifted and we obtain a valley-dependent Berry curvature, leading to a tunable antidamping torque by controlling the valley degree of freedom. The valley imbalance can be as high as 100% by tuning the bias voltage or magnetization angle. These findings open new venues for the development of current-driven spin-orbit torques by structural design.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Valley-dependent spin-orbit torques in two-dimensional hexagonal crystals 2016, 93 (3) Physical Review B
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
11-Jan-2016
DOI:
10.1103/PhysRevB.93.035417
Type:
Article
ISSN:
2469-9950; 2469-9969
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.93.035417
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Hangen
dc.contributor.authorWang, Xuhuien
dc.contributor.authorManchon, Aurelienen
dc.date.accessioned2016-01-18T07:57:23Zen
dc.date.available2016-01-18T07:57:23Zen
dc.date.issued2016-01-11en
dc.identifier.citationValley-dependent spin-orbit torques in two-dimensional hexagonal crystals 2016, 93 (3) Physical Review Ben
dc.identifier.issn2469-9950en
dc.identifier.issn2469-9969en
dc.identifier.doi10.1103/PhysRevB.93.035417en
dc.identifier.urihttp://hdl.handle.net/10754/593663en
dc.description.abstractWe study spin-orbit torques in two-dimensional hexagonal crystals such as graphene, silicene, germanene, and stanene. The torque possesses two components, a fieldlike term due to inverse spin galvanic effect and an antidamping torque originating from Berry curvature in mixed spin-k space. In the presence of staggered potential and exchange field, the valley degeneracy can be lifted and we obtain a valley-dependent Berry curvature, leading to a tunable antidamping torque by controlling the valley degree of freedom. The valley imbalance can be as high as 100% by tuning the bias voltage or magnetization angle. These findings open new venues for the development of current-driven spin-orbit torques by structural design.en
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.93.035417en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleValley-dependent spin-orbit torques in two-dimensional hexagonal crystalsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorLi, Hangen
kaust.authorWang, Xuhuien
kaust.authorManchon, Aurelienen
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