Tailoring spin-orbit torque in diluted magnetic semiconductors

TL;DR

This paper investigates how intrinsic Dresselhaus spin-orbit coupling influences spin orbit torque in diluted magnetic semiconductors, revealing correlations with Fermi surface anisotropy and nonlinear dependence on exchange coupling, enabling tailored spin torque properties.

Contribution

It demonstrates the potential to customize spin orbit torque magnitude and angular dependence through structural design in diluted magnetic semiconductors.

Findings

Strong correlation between torque angular dependence and Fermi surface anisotropy

Spin orbit torque exhibits nonlinear dependence on exchange coupling

Structural design can tailor spin torque properties

Abstract

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.