We report a very large spin-orbit torque (SOT) capability of chromium-based transition metal dichalcogenides (TMD) in their Janus forms CrXTe, with X=S,Se. The structural inversion symmetry breaking, inherent to Janus structures is responsible for a large SOT response generated by giant Rashba splitting, equivalent to that obtained by applying a transverse electric field of ∼100Vnm−1 in non-Janus CrTe\textsubscript{2}, completely out of experimental reach. By performing transport simulations on custom-made Wannier tight-binding models, Janus systems are found to exhibit a SOT performance comparable to the most efficient two-dimensional materials, while allowing for field-free perpendicular magnetization switching owing to their reduced in-plane symmetry. Altogether, our findings evidence that magnetic Janus TMDs stand as suitable candidates for ultimate SOT-MRAM devices.
@article{arxiv.2404.15134,
title = {Giant Spin-Orbit Torque in Cr-based Janus Transition Metal Dichalcogenides},
author = {Libor Vojáček and Joaquín Medina Dueñas and Jing Li and Fatima Ibrahim and Aurélien Manchon and Stephan Roche and Mairbek Chshiev and José H. García},
journal= {arXiv preprint arXiv:2404.15134},
year = {2024}
}