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arXiv 1202.1406cond-mat.mes-hall
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Rashba自旋轨道耦合引起的巨自旋动力的预测

Prediction of Giant Spin Motive Force due to Rashba Spin-Orbit Coupling

Kyoung-Whan Kim, Jung-Hwan Moon, Kyung-Jin Lee, Hyun-Woo Lee

摘要:

在铁磁体中的磁化动力学可以通过自旋原动力感生自旋相关的电场。由自旋相关的电场产生的自旋电流又可以通过自旋转移力矩来修改磁化动力学。虽然这种反馈效应通常很弱,因此被忽略,我们预测,在Rashba自旋轨道耦合系统与大的Rashba参数$α_{\rm R}$,耦合产生的自旋相关的电场[ $\pm(α_{\rm R}m_e/e\hbar) (\vhat{z}\times \partial \vec{m}/\partial t)]$,它可以大到足以修改磁化动力学显着。这种效应应该与基于具有强Rashba自旋轨道耦合的磁性层的器件应用相关。

英文摘要:

Magnetization dynamics in a ferromagnet can induce a spin-dependent electric field through spin motive force. Spin current generated by the spin-dependent electric field can in turn modify the magnetization dynamics through spin-transfer torque. While this feedback effect is usually weak and thus ignored, we predict that in Rashba spin-orbit coupling systems with large Rashba parameter $α_{\rm R}$, the coupling generates the spin-dependent electric field [$\pm(α_{\rm R}m_e/e\hbar) (\vhat{z}\times \partial \vec{m}/\partial t)]$, which can be large enough to modify the magnetization dynamics significantly. This effect should be relevant for device applications based on ultrathin magnetic layers with strong Rashba spin-orbit coupling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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