| Literature DB >> 28030948 |
Yinming Shao1, Kirk W Post2, Jhih-Sheng Wu2, Siyuan Dai2, Alex J Frenzel2, Anthony R Richardella3, Joon Sue Lee3, Nitin Samarth3, Michael M Fogler2, Alexander V Balatsky4,5, Dmitri E Kharzeev6,7, D N Basov1,2.
Abstract
Using magneto-infrared spectroscopy, we have explored the charge dynamics of (Bi,Sb)2Te3 thin films on InP substrates. From the magneto-transmission data we extracted three distinct cyclotron resonance (CR) energies that are all apparent in the broad band Faraday rotation (FR) spectra. This comprehensive FR-CR data set has allowed us to isolate the response of the bulk states from the intrinsic surface states associated with both the top and bottom surfaces of the film. The FR data uncovered that electron- and hole-type Dirac Fermions reside on opposite surfaces of our films, which paves the way for observing many exotic quantum phenomena in topological insulators.Entities:
Keywords: Bismuth antimony telluride; Faraday rotation; cyclotron resonance; topological insulators; topological surface states
Year: 2017 PMID： 28030948 DOI： 10.1021/acs.nanolett.6b04313
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189