Angular dependence of spin-orbit spin-transfer torques

Handle URI:
http://hdl.handle.net/10754/555699
Title:
Angular dependence of spin-orbit spin-transfer torques
Authors:
Lee, Ki-Seung; Go, Dongwook; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Haney, Paul M.; Stiles, M. D.; Lee, Hyun-Woo; Lee, Kyung-Jin
Abstract:
In ferromagnet/heavy-metal bilayers, an in-plane current gives rise to spin-orbit spin-transfer torque, which is usually decomposed into fieldlike and dampinglike torques. For two-dimensional free-electron and tight-binding models with Rashba spin-orbit coupling, the fieldlike torque acquires nontrivial dependence on the magnetization direction when the Rashba spin-orbit coupling becomes comparable to the exchange interaction. This nontrivial angular dependence of the fieldlike torque is related to the Fermi surface distortion, determined by the ratio of the Rashba spin-orbit coupling to the exchange interaction. On the other hand, the dampinglike torque acquires nontrivial angular dependence when the Rashba spin-orbit coupling is comparable to or stronger than the exchange interaction. It is related to the combined effects of the Fermi surface distortion and the Fermi sea contribution. The angular dependence is consistent with experimental observations and can be important to understand magnetization dynamics induced by spin-orbit spin-transfer torques.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Angular dependence of spin-orbit spin-transfer torques 2015, 91 (14) Physical Review B
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
6-Apr-2015
DOI:
10.1103/PhysRevB.91.144401
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.91.144401
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLee, Ki-Seungen
dc.contributor.authorGo, Dongwooken
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorHaney, Paul M.en
dc.contributor.authorStiles, M. D.en
dc.contributor.authorLee, Hyun-Wooen
dc.contributor.authorLee, Kyung-Jinen
dc.date.accessioned2015-05-25T11:56:14Zen
dc.date.available2015-05-25T11:56:14Zen
dc.date.issued2015-04-06en
dc.identifier.citationAngular dependence of spin-orbit spin-transfer torques 2015, 91 (14) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.91.144401en
dc.identifier.urihttp://hdl.handle.net/10754/555699en
dc.description.abstractIn ferromagnet/heavy-metal bilayers, an in-plane current gives rise to spin-orbit spin-transfer torque, which is usually decomposed into fieldlike and dampinglike torques. For two-dimensional free-electron and tight-binding models with Rashba spin-orbit coupling, the fieldlike torque acquires nontrivial dependence on the magnetization direction when the Rashba spin-orbit coupling becomes comparable to the exchange interaction. This nontrivial angular dependence of the fieldlike torque is related to the Fermi surface distortion, determined by the ratio of the Rashba spin-orbit coupling to the exchange interaction. On the other hand, the dampinglike torque acquires nontrivial angular dependence when the Rashba spin-orbit coupling is comparable to or stronger than the exchange interaction. It is related to the combined effects of the Fermi surface distortion and the Fermi sea contribution. The angular dependence is consistent with experimental observations and can be important to understand magnetization dynamics induced by spin-orbit spin-transfer torques.en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.91.144401en
dc.rightsArchived with thanks to Physical Review B ©2015 American Physical Societyen
dc.titleAngular dependence of spin-orbit spin-transfer torquesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Materials Science and Engineering, Korea University, Seoul 136-701, Koreaen
dc.contributor.institutionPCTP and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Koreaen
dc.contributor.institutionCenter for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USAen
dc.contributor.institutionKU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-713, Koreaen
kaust.authorManchon, Aurelienen
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