Mr. Wenhua Xuan Profile

Wenhua Xuan

at Kunming Univ

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Proceedings Article | 12 April 2023 Paper

Biaxial strain on the Rashba spin splitting and optical absorption of MoSSe/WSe2 heterostructures

Wenhua Xuan, Hai Yang, Guojun Jin

Proceedings Volume 12565, 1256516 (2023) https://doi.org/10.1117/12.2662009

KEYWORDS: Heterojunctions, Absorption, Reflectivity, Electrons, Spintronics, Optical properties, Optoelectronics, Optoelectronic devices

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This work uses the first-principles calculation method to systematically investigate the Rashba spin splitting and optical properties of MoSSe/WSe₂ heterostructures under biaxial strain. The results show that, firstly, the most stable MoSSe/WSe₂ heterostructure has a type II band arrangement with a direct band gap of 0.47eV, which is conducive to the separation of photogenerated electron-hole pairs. Secondly, for spin-orbit coupling, the Rashba spin splitting occurs at the Γ point, an applying biaxial strain can suppress the strength of its Rashba splitting by tensile strain and promote the strength of its Rashba splitting by compressive strain. Thirdly, the MoSSe/WSe₂ heterostructure has higher optical absorption coefficients than the two monolayers, and the absorption spectrum undergoes a red-shift and a blue-shift under strain. These results suggest that the MoSSe/WSe₂ heterostructure has potential applications in spintronics and optoelectronic devices.

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