2014/03/31 by Badih A. Assaf, B. A. Assaf, F. Katmis +15 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemical and Physical Properties of Materials #Degenerate energy levels #Multiplicity (mathematics) #Point reflection #Quantum #Scattering #Surface states #T-symmetry #Thin film #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4895456
published as Applied Physics Letters, 105, 102108 (2014) · Updated abstract to published version
openalex publication_date 2014/09/08 · arxiv created 2014/12/03 · arxiv updated 2014/12/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.