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Title: Quantum coherent transport in SnTe topological crystalline insulator thin films

Topological crystalline insulators (TCI) are unique systems where a band inversion that is protected by crystalline mirror symmetry leads to a multiplicity of topological surface states. Binary SnTe is an attractive lead-free TCI compound; the present work on high-quality thin films provides a route for increasing the mobility and reducing the carrier density of SnTe without chemical doping. Results of quantum coherent magnetotransport measurements reveal a multiplicity of Dirac surface states that are unique to TCI. Modeling of the weak antilocalization shows variations in the extracted number of carrier valleys that reflect the role of coherent intervalley scattering in coupling different Dirac states on the degenerate TCI surface.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ; ;  [7]
  1. Department of Physics, Northeastern University, Boston, Massachusetts 02115 (United States)
  2. Francis Bitter Magnet Laboratory, MIT, Cambridge, Massachusetts 02139 (United States)
  3. (United States)
  4. Department of Physics, MIT, Cambridge, Massachusetts 02139 (United States)
  5. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)
  6. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  7. Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115 (United States)
Publication Date:
OSTI Identifier:
22310830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARRIER DENSITY; CARRIER MOBILITY; CARRIERS; COUPLING; MIRRORS; MULTIPLICITY; SCATTERING; SIMULATION; SURFACES; SYMMETRY; THIN FILMS; TIN TELLURIDES; TOPOLOGY