%0 Journal Article
%T Magnetoexcitons and optical absorption of bilayer-structured topological insulators
%A Zhigang Wang
%A Zhen-Guo Fu
%A Ping Zhang
%J Physics
%D 2012
%I arXiv
%R 10.1063/1.4704657
%X 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.
%U http://arxiv.org/abs/1201.2505v2