Non-relativistic spin splitting in antiferromagnets has recently attracted considerable attention. Here we present a universal framework for controlling such spin splitting by identifying and manipulating the key atomic distortions that govern it through external perturbations. We demonstrate this concept by tuning the spin-splitting energy in three representative materials with diverse symmetries, inversion-symmetric MnF2, ferroelectric BaCuF4, and LaMnO3/RMnO3 superlattices. Our results emphasize the essential role of higher-order magnetic multipoles and the intrinsic structure-spin correlations in these systems, thereby advancing current efforts to control spin splitting in real materials and motivating future experimental studies.
@article{arxiv.2509.20041,
title = {A Universal Framework for Controlling Non-Relativistic Spin Splitting},
author = {Aniruddha Ray and Subhadeep Bandyopadhyay and Sayantika Bhowal},
journal= {arXiv preprint arXiv:2509.20041},
year = {2025}
}