Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling
Abstract
Spin-transfer torques (STT), Gilbert damping (GD), and effective spin renormalization (ESR) are investigated microscopically in a 2D Rashba ferromagnet with spin-independent Gaussian white-noise disorder. Rashba spin-orbit coupling induced anisotropy of these phenomena is thoroughly analysed. 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.
Keywords
Cite
@article{arxiv.1907.02041,
title = {Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling},
author = {I. A. Ado and P. M. Ostrovsky and M. Titov},
journal= {arXiv preprint arXiv:1907.02041},
year = {2020}
}
Comments
20 pages, 4 figures