Quantum oscillations in magnetothermopower measurements of the topological insulator Bi2Te3

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

doi:10.1103/PhysRevLett.109.246602

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 language	English (US)
Article number	246602
Journal	Physical review letters
Volume	109
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.109.246602
State	Published - Dec 10 2012

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.109.246602

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title = "Quantum oscillations in magnetothermopower measurements of the topological insulator Bi2Te3",

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.",

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AB - 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.

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Quantum oscillations in magnetothermopower measurements of the topological insulator Bi₂Te₃

Abstract

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