Tailoring spin-orbit torque in diluted magnetic semiconductors

摘要

We study the spin orbit torque arising from an intrinsic linear Dresselhaus spin-orbit coupling in a single layer Ⅲ-Ⅴ diluted magnetic semiconductor. We investigate the transport properties and spin torque using the linear response theory, and we report here: (1) a strong correlation exists between the angular dependence of the torque and the anisotropy of the Fermi surface; (2) the spin orbit torque depends nonlinearly on the exchange coupling. Our findings suggest the possibility to tailor the spin orbit torque magnitude and angular dependence by structural design.