We predict that a lateral electrical current in antiferromagnets can induce non-equilibrium N\'eel order fields, i.e. fields whose sign alternates between the spin sublattices, which can trigger ultra-fast spin-axis reorientation. Based on microscopic transport theory calculations we identify staggered current-induced fields analogous to the intra-band and to the intrinsic inter-band spin-orbit fields previously reported in ferromagnets with a broken inversion-symmetry crystal. To illustrate their rich physics and utility, we considered bulk Mn2Au with the two spin sublattices forming inversion partners, and a 2D square-lattice antiferromagnet with broken structural inversion symmetry modelled by a Rashba spin-orbit coupling. We propose an AFM memory device with electrical writing and reading.
@article{arxiv.1410.8296,
title = {Relativistic Neel-order fields induced by electrical current in antiferromagnets},
author = {J. Zelezny and H. Gao and K. Vyborny and J. Zemen and J. Masek and A. Manchon and J. Wunderlich and J. Sinova and T. Jungwirth},
journal= {arXiv preprint arXiv:1410.8296},
year = {2016}
}