Nonlinear Magnetic Orbital Hall Effect Induced by Spin-Orbit Coupling
Abstract
Electrical readout of 180 switching in strictly compensated collinear antiferromagnets remains a major challenge in antiferromagnetic spintronics. Electrical writing of perpendicularly magnetized ferromagnets by out-of-plane orbital torque remains an important challenge in orbitronics. In this work, we propose a second-order nonlinear magnetic orbital Hall effect in the source antiferromagnet as a simultaneous recipe for both difficulties. This orbitronics effect is induced by spin-orbit coupling and is odd in the N\'eel vector, thus is a unique effect that integrates both functionalities via electric control of the N\'eel vector in the source antiferromagnet. Our first-principles calculations in CuMnAs predict significant non-perturbative orbital effects from spin-orbit coupling, with a orbital Berry-curvature dipole mechanism. These findings unveil new possibilities opened by topological antiferromagnetic orbitronics.
Cite
@article{arxiv.2604.02636,
title = {Nonlinear Magnetic Orbital Hall Effect Induced by Spin-Orbit Coupling},
author = {Hui Wang and Huiying Liu and Yanfeng Ge and Xukun Feng and Jiaojiao Zhu and Jin Cao and Cong Xiao and Shengyuan A. Yang and Lay Kee Ang},
journal= {arXiv preprint arXiv:2604.02636},
year = {2026}
}