Monolayer Janus transition-metal dichalcogenides (TMDCs), such as WSeTe, exhibit Rashba-type spin-orbit coupling (SOC) due to broken out-of-plane mirror symmetry. Here, we theoretically demonstrate that pure spin Hall currents can be generated under light irradiation based on a tight-binding model. Rashba-type SOC plays a crucial role in determining the spin polarization direction and enhancing the generation efficiency of pure spin Hall currents. Our findings establish Janus TMDCs as promising materials for next-generation optospintronic devices.
@article{arxiv.2505.06622,
title = {Optically induced spin Hall current in Janus transition-metal dichalcogenides},
author = {Tomoaki Kameda and Katsunori Wakabayashi},
journal= {arXiv preprint arXiv:2505.06622},
year = {2025}
}