Optical refraction and absorption spectra in perturbed monolayer PbBiI

Autor:	Tran C. Phong, Le T. T. Phuong
Rok vydání:	2022
Předmět:	General Physics and Astronomy
Zdroj:	Journal of Applied Physics. 132:014302
ISSN:	1089-7550 0021-8979
Popis:	We investigate the optical properties of a noncentrosymmetric quantum spin Hall insulator in the presence of electric and magnetic fields. We employ the Kubo formula to engineer the optical redshift and blueshift phenomena through the interplay between the bulk gap, the Rashba-like gap, and the external fields. Intriguingly, for a range of electric (magnetic) fields, the refracted and absorbed lights exhibit direct (indirect) interband optical transitions. Accordingly, for a critical electric field, optical refraction and absorption spectrum decreases gradually and becomes constant, respectively. While for a critical magnetic field, step-like jumps appear in the optical coefficients. All these findings are discussed in the context of symmetry breaking.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ad3ba2e654c7435d3e1119ee48fd391 https://doi.org/10.1063/5.0097931 Zobrazit plný text záznamu