Magnetoexcitons and optical absorption of bilayer-structured topological insulators
Mesoscale and Nanoscale Physics
2012-04-19 v2
Abstract
Optical absorption properties of magnetoexcitons in topological insulator bilayers under a strong magnetic field are theoretically studied. A general analytical formula of optical absorption selection rule is obtained in the noninteracting as well as Coulomb intra-Landau-level interacting cases, which remarkably helps to interpret the resonant peaks in absorption spectroscopy and the corresponding formation of Dirac-type magnetoexcitons. We also discuss the optical absorption spectroscopy of magnetoexcitons in the presence of inter-Landau-level Coulomb interaction, which becomes more complex. Our results could be detected in the magneto-optical experiments.
Keywords
Cite
@article{arxiv.1201.2505,
title = {Magnetoexcitons and optical absorption of bilayer-structured topological insulators},
author = {Zhigang Wang and Zhen-Guo Fu and Ping Zhang},
journal= {arXiv preprint arXiv:1201.2505},
year = {2012}
}
Comments
4 APL pages, 5 figures