Quantum Oscillations in a Topological Insulator Bi₂Te₂Se with Large Bulk Resistivity (6 Ω cm)
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 Bν vs. filling factor ν shows a 12-shift, consistent with massless, Dirac states.
J. Xiong et al., "Quantum Oscillations in a Topological Insulator Bi₂Te₂Se with Large Bulk Resistivity (6 Ω cm)," Physica E: Low-dimensional Systems and Nanostructures, vol. 44, no. 5, pp. 917 - 920, Elsevier, Feb 2012.
The definitive version is available at https://doi.org/10.1016/j.physe.2011.09.011
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)
Article - Journal
© 2012 Elsevier, All rights reserved.
01 Feb 2012