Quantum coherent transport in SnTe topological crystalline insulator thin films
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 08, 2014
- Source ID
- 10.1063/1.4895456
Entities
People
- B. A. Assaf
- Biswarup Satpati
- D. Heiman
- F. Katmis
- J. S. Moodera
- P. Wei
- S. P. Bennett
- Vincent G. Harris
- Zhicai Zhang
Organizations
- Argonne National Laboratory
- Division of Materials Research
- Massachusetts Institute of Technology
- Northeastern University
- Office of Naval Research
- Saha Institute of Nuclear Physics