Topological spin-torque in non-collinear anti-ferromagnetic 3Q state

TL;DR

This paper explores the topological spin-torque phenomena in a non-collinear 3Q antiferromagnetic state, revealing edge effects and the influence of system boundaries on torque direction, with implications for spintronic applications.

Contribution

It provides a detailed analysis of spin-torque in topological 3Q AFM states, highlighting edge effects and boundary-dependent torque directions, which are novel insights in this context.

Findings

Non-vanishing spin-torque at system edges

Edge torque direction depends on system boundary cuts

Topological features influence spin-torque behavior

Abstract

We investigate the spin torque in the topological phase of the 3Q antiferromagnetic (AFM) configuration. We first obtain the band structure to identify the topology and nature of the different gaps of the system and then calculate the spin density in the whole system. We demonstrate the presence of a non-vanishing spin-torque component at the edge of the system and analyze its effect on the texture. Moreover, we show that the direction of the torque depends hugely on the way we cut the system to define the edge.