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Article: Magnetization dynamics driven by non-equilibrium spin-orbit coupled electron gas

TitleMagnetization dynamics driven by non-equilibrium spin-orbit coupled electron gas
Authors
Issue Date2015
PublisherInstitute of Physics and Deutsche Physikalische Gesellschaft. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP
Citation
New Journal of Physics, 2015, v. 17, p. 053012 How to Cite?
AbstractThe dynamics of magnetization coupled with an electron gas via s-d exchange interaction is investigated by using the density matrix technique. Our theory shows that nonequilibrium spin accumulation induces a spin torque and the electron bath leads to a damping of the magnetization . For the two-dimensional magnetization thin film coupled to the electron gas with Rashba spin-orbit coupling, the result for the spin-orbit torques is consistent with previous semiclassical theory. However, our theory predicts a damping of the magnetization, which is absent in semiclassical theory. The magnitude of the damping due to the electron bath is comparable to the intrinsic Gilbert damping and may be important in describing the magnetization dynamics of the system.
Persistent Identifierhttp://hdl.handle.net/10722/211911

 

DC FieldValueLanguage
dc.contributor.authorWang, Y-
dc.contributor.authorChen, W-
dc.contributor.authorZhang, F-
dc.date.accessioned2015-07-21T02:15:41Z-
dc.date.available2015-07-21T02:15:41Z-
dc.date.issued2015-
dc.identifier.citationNew Journal of Physics, 2015, v. 17, p. 053012-
dc.identifier.urihttp://hdl.handle.net/10722/211911-
dc.description.abstractThe dynamics of magnetization coupled with an electron gas via s-d exchange interaction is investigated by using the density matrix technique. Our theory shows that nonequilibrium spin accumulation induces a spin torque and the electron bath leads to a damping of the magnetization . For the two-dimensional magnetization thin film coupled to the electron gas with Rashba spin-orbit coupling, the result for the spin-orbit torques is consistent with previous semiclassical theory. However, our theory predicts a damping of the magnetization, which is absent in semiclassical theory. The magnitude of the damping due to the electron bath is comparable to the intrinsic Gilbert damping and may be important in describing the magnetization dynamics of the system.-
dc.languageeng-
dc.publisherInstitute of Physics and Deutsche Physikalische Gesellschaft. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP-
dc.relation.ispartofNew Journal of Physics-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleMagnetization dynamics driven by non-equilibrium spin-orbit coupled electron gas-
dc.typeArticle-
dc.identifier.emailWang, Y: yongwang@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1088/1367-2630/17/5/053012-
dc.identifier.hkuros245033-
dc.identifier.volume17-
dc.identifier.spage053012-
dc.identifier.epage053012-

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