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

I. A. Ado; M. Titov; P. M. Ostrovsky

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

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arxiv 1907.02041 v3 pith:HJ54FVUM submitted 2019-07-03 cond-mat.mes-hall

I. A. Ado , P. M. Ostrovsky , M. Titov This is my paper · ORCID

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keywords rashbaspintorquesanisotropycouplingdampinggilbertinduced

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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.

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Spin-orbit torques in a Rashba honeycomb antiferromagnet
cond-mat.dis-nn 2019-08 conditional novelty 6.0 of 10

Spin-orbit torques in a honeycomb antiferromagnet are computed numerically; they vanish in the symmetric model and become finite and anisotropic when sublattice symmetry is broken.

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