The diverse magneto-optical selection rules in bilayer black phosphorus

Authors

Jhao-Ying Wu, National Kaohsiung Marine University
Szu-Chao Chen, National Cheng Kung University
Thi-Nga Do, National Kaohsiung Normal University
Wu-Pei Su, University of Houston
Godfrey Gumbs, CUNY Hunter CollegeFollow
Ming-Fa Lin, Hierarchical Green-Energy Materials

Document Type

Article

Publication Date

9-5-2018

Abstract

The magneto-optical properties of bilayer phosphorene is investigated by the generalized tight-binding model and the gradient approximation. The vertical inter-Landau-level transitions, being sensitive to the polarization directions, are mainly determined by the spatial symmetries of sub-envelope functions on the distinct sublattices. The anisotropic excitations strongly depend on the electric and magnetic fields. A uniform perpendicular electric field could greatly diversify the selection rule, frequency, intensity, number and form of symmetric absorption peaks. Specifically, the unusual magneto-optical properties appear beyond the critical field as a result of two subgroups of Landau levels with the main and side modes. The rich and unique magnetoabsorption spectra arise from the very close relations among the geometric structures, multiple intralayer and interlayer hopping integrals and composite external fields.

Comments

This article was originally published in Scientific Reports, available at DOI:10.1038/s41598-018-31358-w.

This article is licensed under a Creative Commons Attribution 4.0 International License.