Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.aop.2010.11.014
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dc.titleSpin dynamics under local gauge fields in chiral spin-orbit coupling systems
dc.contributor.authorTan, S.G.
dc.contributor.authorJalil, M.B.A.
dc.contributor.authorFujita, T.
dc.contributor.authorLiu, X.J.
dc.date.accessioned2014-06-17T03:06:38Z
dc.date.available2014-06-17T03:06:38Z
dc.date.issued2011-02
dc.identifier.citationTan, S.G., Jalil, M.B.A., Fujita, T., Liu, X.J. (2011-02). Spin dynamics under local gauge fields in chiral spin-orbit coupling systems. Annals of Physics 326 (2) : 207-215. ScholarBank@NUS Repository. https://doi.org/10.1016/j.aop.2010.11.014
dc.identifier.issn00034916
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/57478
dc.description.abstractWe present a theoretical description of local spin dynamics in magnetic systems with a chiral spin texture and finite spin-orbit coupling (SOC). Spin precession about the relativistic effective magnetic field in a SOC system gives rise to a non-Abelian SU(2) gauge field reminiscent of the Yang-Mills field. In addition, the adiabatic relaxation of electron spin along the local spin yields an U(1). ⊗. U(1) topological gauge (Berry) field. We derive the corresponding equation of motion i.e. modified Landau-Lifshitz-Gilbert (LLG) equation, for the local spin under the influence of these effects. Focusing on the SU(2) gauge, we obtain the spin torque magnitude, and the amplitude and frequency of spin oscillations in this system. Our theoretical estimates indicate significant spin torque and oscillations in systems with large spin-orbit coupling, which may be utilized in technological applications such as current-induced magnetization-switching and tunable microwave oscillators. © 2010 Elsevier Inc.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.aop.2010.11.014
dc.sourceScopus
dc.subjectBerry curvature
dc.subjectSpin torque
dc.subjectSpin transport
dc.subjectSpin-orbit coupling
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/j.aop.2010.11.014
dc.description.sourcetitleAnnals of Physics
dc.description.volume326
dc.description.issue2
dc.description.page207-215
dc.description.codenAPNYA
dc.identifier.isiut000287015700001
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