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arXiv 1503.06872cond-mat.mtrl-scicond-mat.dis-nncond-mat.mes-hall
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二维Rashba铁磁体中的自旋-轨道力矩

Spin-Orbit Torques in Two-Dimensional Rashba Ferromagnets

A. Qaiumzadeh, R. A. Duine, M. Titov

摘要:

如果自旋轨道耦合足够强,单畴铁磁体的磁化动力学可以由电荷电流触发。本文应用泛函Keldysh理论研究了二维金属铁磁体中的Rashba自旋轨道矩。一个反应性的,反阻尼的自旋轨道扭矩以及耗散的,类场扭矩计算微观,在自旋轨道相互作用强度的领先顺序。通过计算第一顶点修正,我们表明,除非散射率是自旋相关的,否则固有的反阻尼力矩消失。

英文摘要:

Magnetization dynamics in single-domain ferromagnets can be triggered by charge current if spin-orbit coupling is sufficiently strong. We apply functional Keldysh theory to investigate Rashba spin-orbit torques in metallic two-dimensional ferromagnets. A reactive, anti-damping-like spin-orbit torque as well as a dissipative, field-like torque are calculated microscopically, to the leading order in the spin-orbit interaction strength. By calculating the first vertex correction we show that the intrinsic anti-damping-like torque vanishes unless the scattering rates are spin-dependent.

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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