Optically induced spin Hall current in Janus transition-metal dichalcogenides

Abstract

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.

12 pages, 8 figures

References in corpus (8)

• Two Dimensional Atomic Crystals
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• The Valley Hall Effect in MoS2 Transistors
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Intrinsic spin Hall effect in monolayers of group-VI dichalcogenides: A first-principles study
• Optical Hall conductivity in ordinary and graphene QHE systems
• Momentum selective optical absorption in triptycene molecular membrane