Optical characteristic study of monolayer VS2 based on first-principles calculations. (October 2017)

• Record Type: Journal Article
• Authors: Ding, Zhiyuan; Peng, Junhao; Xie, Xing; Hu, Jianwei; Yang, Hanqi; Wu, Fugen; Dong, Huafeng
• Is Part Of: Solid state communications. Volume 266(2017)
• Page Start: 26
• Page End: 29
• Publication Date: 2017-10
• Subjects: Two-dimensional materials -- VS2 -- First-principles calculations -- Optical properties; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2017.08.008
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: Monolayer VS2 has two common stable phases, 2H-phase and 1T-phase. Based on first-principles calculations, we studied the optical properties of 2D-VS2, including their dielectric functions, absorption coefficients, refraction indexes and energy loss functions. Also, we fully analyzed the relationship between the electronic structure and the optical characteristics of 2D-VS2 . We found that the differences of density of states are the fundamental reasons for the differences of the two phase optical absorption behavior. Highlights: The optical properties of 2D-VS2 are studied systematically, helping the applications of 2D-VS2 in optoelectronic devices. Clarified the relationship between the electronic structure and the optical characteristics of 2D-VS2 . The difference of density of states is the reason for the difference of the two phases optical absorption behavior.