Discovering alternative ways to drive domain wall (DW) dynamics is crucial for advancing spintronic applications. Here we demonstrate via atomistic spin dynamics simulations that optical torques can efficiently drive 90^{\circ} DWs in the Mn2Au antiferromagnet but their spatial symmetry forbids the motion of 180^{\circ} walls. In the steady-state regime, the kinematics display special relativity signatures accessed for low laser intensities. At velocities higher than the magnonic limit, the DW enters a proliferation regime in which part of its relativistic energy is invested into the nucleation of novel magnetic textures. Our investigation contributes towards the fundamental understanding of opto-magnetic effects, supporting the development of next generation, all-optically controlled antiferromagnetic spintronics.
@article{arxiv.2405.09253,
title = {Efficient motion of 90^{\circ} domain walls in Mn_{2}Au via pure optical torques},
author = {Paul-Iulian Gavriloaea and Jackson L. Ross and Frank Freimuth and Yuriy Mokrousov and Richard F. L. Evans and Roy Chantrell and Oksana Chubykalo-Fesenko and Rubén M. Otxoa},
journal= {arXiv preprint arXiv:2405.09253},
year = {2024}
}