Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling

Article

关键词: DOMAIN-WALL MOTION;    MAGNETIZATION DYNAMICS;    CONDUCTION ELECTRONS;    DRIVEN;    EMERGENCE;   

DOI  :  10.1103/PhysRevB.101.085405

来源: SCIE

【 摘 要 】

Spin-transfer torques (STT), Gilbert damping (GD), and effective spin renormalization (ESR) are investigated microscopically in a two-dimensional Rashba ferromagnet with spin-independent Gaussian white-noise disorder. Rashba spin-orbit coupling-induced anisotropy of these phenomena is thoroughly analyzed. For the case of two partly filled spin subbands, a remarkable relation between the anisotropic STT, GD, and ESR is established. In the absence of magnetic field and other torques on magnetization, this relation corresponds to a current-induced motion of a magnetic texture with the classical drift velocity of conduction electrons. Finally, we compute spin susceptibility of the system and generalize the notion of spin-polarized current.

【 授权许可】

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