Theoretical study of spin-orbit coupling in Janus monolayer MA2Z4. Issue 1 (1st April 2022)

• Record Type: Journal Article
• Authors: Wu, Liang; Zhou, Wenzhe; Zhang, Dehe; Ouyang, Fangping
• Is Part Of: Journal of physics. Volume 2263:Issue 1(2022)
• Publication Date: 2022-04-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2263/1/012014
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: In this paper, based on first-principles calculations, we investigate the energy valley and spin-orbit coupling properties of Janus monolayer MA2 Z4 . The stability of different structures is illustrated. Due to the breaking of mirror symmetry, Rashba splitting occurs at the Γ point in the band structures of Janus monolayers WSiGeN4 and WSi2 (NP)2 . The relationship between Rashba spin-orbit coupling strength and potential energy gradient and d-orbital composition is explored. Janus monolayer WSi2 (NP)2 has stronger Rashba effect than WSiGeN4 due to the strong asymmetry of the d orbital of W atom. These results help to promote the application of two-dimensional materials in spintronics and valleytronics.