skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Faraday Rotation Due to Surface States in the Topological Insulator (Bi1–xSbx)2Te3

Journal Article · · Nano Letters
ORCiD logo [1];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [2];  [4];  [5];  [6]
  1. Columbia Univ., New York, NY (United States). Department of Physics
  2. University of California-San Diego, La Jolla, CA (United States). Physics Department
  3. Pennsylvania State Univ., University Park, PA (United States). Dept of Physics
  4. 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
  5. 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
  6. 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
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

References (40)

Parallel field magnetoresistance in topological insulator thin films journal July 2013
Topological insulators and superconductors journal October 2011
Evidence of the two surface states of (Bi0.53Sb0.47)2Te3 films grown by van der Waals epitaxy journal December 2013
Landau Quantization and the Thickness Limit of Topological Insulator Thin Films of Sb 2 Te 3 journal January 2012
Theory of Kerr and Faraday rotations and linear dichroism in Topological Weyl Semimetals journal August 2015
Highly tunable electron transport in epitaxial topological insulator (Bi 1- x Sb x ) 2 Te 3 thin films journal September 2012
Optical Hall Conductivity in Ordinary and Graphene Quantum Hall Systems journal September 2009
Universal Faraday Rotation in HgTe Wells with Critical Thickness journal September 2016
Magneto-Optical Signature of Massless Kane Electrons in Cd 3 As 2 journal September 2016
Quantized Faraday and Kerr rotation and axion electrodynamics of a 3D topological insulator journal December 2016
Quantum Faraday and Kerr rotations in graphene journal May 2013
High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator Cu 0.02 Bi 2 Se 3 journal November 2015
Classical to quantum crossover of the cyclotron resonance in graphene: a study of the strength of intraband absorption journal September 2012
Ambipolar field effect in the ternary topological insulator (BixSb1–x)2Te3 by composition tuning journal October 2011
Topological field theory of time-reversal invariant insulators journal November 2008
Quasiclassical cyclotron resonance of Dirac fermions in highly doped graphene journal October 2010
Magneto-optical conductivity in a topological insulator journal July 2013
A tunable topological insulator in the spin helical Dirac transport regime journal July 2009
Multicomponent magneto-optical conductivity of multilayer graphene on SiC journal July 2011
Topologically induced local <mml:math altimg="si13.gif" display="inline" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mrow><mml:mi mathvariant="script">P</mml:mi><mml:mspace width="0.35em"/><mml:mtext>and</mml:mtext><mml:mspace width="0.35em"/><mml:mi mathvariant="script">CP</mml:mi></mml:mrow></mml:math> violation in QCD×QED journal January 2010
Landau-level broadening due to electron-impurity interaction in graphene in strong magnetic fields journal August 2010
The birth of topological insulators journal March 2010
Magneto-optical conductivity in graphene journal December 2006
Landau Quantization of Topological Surface States in Bi 2 Se 3 journal August 2010
Infrared Spectroscopy of Landau Levels of Graphene journal May 2007
Colloquium: Topological insulators journal November 2010
Exciton Condensation and Charge Fractionalization in a Topological Insulator Film journal August 2009
Optical conductivity of bismuth-based topological insulators journal July 2012
Topological magnetoelectric effects in thin films of topological insulators journal August 2015
Electrodynamics of correlated electron materials journal June 2011
Realization of a vertical topological p–n junction in epitaxial Sb2Te3/Bi2Te3 heterostructures journal November 2015
Giant Faraday rotation in single- and multilayer graphene journal November 2010
Band structure engineering in (Bi1−xSbx)2Te3 ternary topological insulators journal September 2011
Investigation of the highest valence band in (Bi1-xSbx)2Te3 crystals journal November 1977
Electrodynamics of high- T c superconductors journal August 2005
Terahertz spectroscopy on Faraday and Kerr rotations in a quantum anomalous Hall state journal July 2016
Sum-Rule Constraints on the Surface State Conductance of Topological Insulators journal September 2015
Magneto-optical Kramers-Kronig analysis journal March 2015
Magneto-optical Faraday and Kerr effects in topological insulator films and in other layered quantized Hall systems journal November 2011
Carrier Scattering from Dynamical Magnetoconductivity in Quasineutral Epitaxial Graphene journal November 2011

Cited By (10)

Chiral Spin Mode on the Surface of a Topological Insulator journal September 2017
rf Quantum Capacitance of the Topological Insulator Bi 2 Se 3 in the Bulk Depleted Regime for Field-Effect Transistors journal February 2018
Terahertz Faraday and Kerr rotation spectroscopy of Bi 1 x Sb x films in high magnetic fields up to 30 tesla journal September 2019
Interband absorption edge in the topological insulators Bi 2 ( Te 1 x Se x ) 3 journal December 2017
Optical signatures of Dirac nodal lines in NbAs 2 journal December 2018
Observation of Extrinsic Photo-Induced Inverse Spin Hall Effect in a GaAs/AlGaAs Two-Dimensional Electron Gas journal October 2018
Chiral Spin Mode on the Surface of a Topological Insulator text January 2017
Helicity-dependent photocurrent of the top and bottom Dirac surface states of epitaxial thin films of three-dimensional topological insulators Sb 2 Te 3 journal December 2019
Observation of chiral surface excitons in a topological insulator Bi 2 Se 3 journal February 2019
Optical Signatures of Dirac Nodal-lines in NbAs$_2$ text January 2018