Quantum oscillations in a topological insulator Bi 2Te 2Se with large bulk resistivity (6 Ω cm)

Jun Xiong, A. C. Petersen, Dongxia Qu, Y. S. Hor, Robert Joseph Cava, Nai Phuan Ong

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127 Scopus citations

Abstract

We report the observation of prominent Shubnikovde Haas oscillations in a Topological Insulator, Bi 2Te 2Se, with large bulk resistivity (6Ωcm at 4 K). By fitting the SdH oscillations, we infer a large metallicity parameter kFℓ=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.

Original languageEnglish (US)
Pages (from-to)917-920
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume44
Issue number5
DOIs
StatePublished - Feb 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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