Title

Quantum Oscillations in a Topological Insulator Bi2Te2Se with Large Bulk Resistivity (6 Ω cm)

Abstract

We report the observation of prominent Shubnikovde Haas oscillations in a Topological Insulator, Bi2Te2Se, with large bulk resistivity (6Ωcm at 4 K). By fitting the SdH oscillations, we infer a large metallicity parameter kF?=41, with a surface mobility ( μs~2800 cm2/Vs) much larger than the bulk mobility ( μb~50 cm2/Vs). The plot of the index fields vs. filling factor ν shows a 12-shift, consistent with massless, Dirac states.

Department(s)

Physics

Keywords and Phrases

Bulk Mobility; Bulk Resistivity; Filling Factor; Metallicities; Quantum Oscillations; Shubnikov-de Haas Oscillations; Surface Mobility; Topological Insulators; Superconducting Materials; Electric Insulators

International Standard Serial Number (ISSN)

1386-9477

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Elsevier, All rights reserved.

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