Quantum oscillations in magnetothermopower measurements of the topological insulator Bi2Te3

Dong Xia Qu, Y. S. Hor, R. J. Cava

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Abstract

We report the magnetothermopower measurements of the nonmetallic topological insulator Bi2Te3 in magnetic fields up to 35 T. Quantum oscillations arising from surface states are observed in both thermoelectric and conductivity tensors. The inferred surface thermopower has a peak magnitude ∼1mV/K possibly as a result of surface electron and bulk phonon interaction. At the n=1 Landau level, we resolve additional quantum oscillations signaling Landau sublevels.

Original languageEnglish (US)
Article number246602
JournalPhysical review letters
Volume109
Issue number24
DOIs
StatePublished - Dec 10 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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