Field-Free Spin-Orbit Torque Switching in Janus Chromium Dichalcogenides.

ABSTRACT: We predict a very large spin-orbit torque (SOT) capability of magnetic chromium-based transition-metal dichalcogenide (TMD) monolayers 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 ∼100 V nm^-1 in non-Janus CrTe₂, completely out of experimental reach. By performing transport simulations on carefully derived Wannier tight-binding models, Janus systems are found to exhibit an SOT performance comparable to the most efficient two-dimensional materials, while additionally allowing for field-free perpendicular magnetization switching, due to their reduced in-p

SUBMITTER: Vojacek L 

PROVIDER: S-EPMC11440640 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature