Faraday Rotation Due to Surface States in the Topological Insulator (Bi1–xSbx)2Te3
- Columbia Univ., New York, NY (United States). Department of Physics
- University of California-San Diego, La Jolla, CA (United States). Physics Department
- Pennsylvania State Univ., University Park, PA (United States). Dept of Physics
- Nordita, KTH Royal Institute of Technology and Stockholm University, Stokholm (Sweden); Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Institute for Materials Science
- Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy; Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Physics and RIKEN-BNL Research Cente
- Columbia Univ., New York, NY (United States). Department of Physics; University of California-San Diego, La Jolla, CA (United States). Physics Department
For this research, 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. Finally, 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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0012704; FG02-00ER45799; FG02-88ER40388
- OSTI ID:
- 1376104
- Report Number(s):
- BNL-113961-2017-JA; KB0301020
- Journal Information:
- Nano Letters, Vol. 17, Issue 2; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 19 works
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