Thermo emf in a two-dimensional electron-hole system in HgTe quantum wells in the presence of magnetic field. The role of the diffusive and the phonon-drag contributions

E. B. Olshanetsky; Z. D. Kvon; G. M. Gusev; M. V. Entin; L. I. Magarill; N. N. Mikhailov

doi:10.1063/10.0002890

Thermo emf in a two-dimensional electron-hole system in HgTe quantum wells in the presence of magnetic field. The role of the diffusive and the phonon-drag contributions

E. B. Olshanetsky, Z. D. Kvon, G. M. Gusev, M. V. Entin, L. I. Magarill, N. N. Mikhailov

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Abstract

We present an experimental study of the thermo emf of a two-dimensional electron-hole system in a 21 nm HgTe quantum well in the presence of magnetic field. The first experimental observation of Nernst-Ettingshausen effect in a 2D semimetal is reported. The comparison between theory and experiment shows that the thermo emf is determined by two contributions: the diffusion and the phonon drag, with the latter contribution several times greater than the first. The conclusion is drawn about the important role of electron-hole scattering in the formation of both thermoelectric power mechanisms.

Original language	English
Pages (from-to)	2-6
Number of pages	5
Journal	Low Temperature Physics
Volume	47
Issue number	1
DOIs	https://doi.org/10.1063/10.0002890
Publication status	Published - 1 Jan 2021

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10.1063/10.0002890

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title = "Thermo emf in a two-dimensional electron-hole system in HgTe quantum wells in the presence of magnetic field. The role of the diffusive and the phonon-drag contributions",

abstract = "We present an experimental study of the thermo emf of a two-dimensional electron-hole system in a 21 nm HgTe quantum well in the presence of magnetic field. The first experimental observation of Nernst-Ettingshausen effect in a 2D semimetal is reported. The comparison between theory and experiment shows that the thermo emf is determined by two contributions: the diffusion and the phonon drag, with the latter contribution several times greater than the first. The conclusion is drawn about the important role of electron-hole scattering in the formation of both thermoelectric power mechanisms. ",

author = "Olshanetsky, {E. B.} and Kvon, {Z. D.} and Gusev, {G. M.} and Entin, {M. V.} and Magarill, {L. I.} and Mikhailov, {N. N.}",

note = "Funding Information: The financial support of this work by Russian Science Foundation (Grant N16-12-10041-P) is acknowledged. Publisher Copyright: {\textcopyright} 2021 Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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doi = "10.1063/10.0002890",

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T1 - Thermo emf in a two-dimensional electron-hole system in HgTe quantum wells in the presence of magnetic field. The role of the diffusive and the phonon-drag contributions

AU - Olshanetsky, E. B.

AU - Kvon, Z. D.

AU - Gusev, G. M.

AU - Entin, M. V.

AU - Magarill, L. I.

AU - Mikhailov, N. N.

N1 - Funding Information: The financial support of this work by Russian Science Foundation (Grant N16-12-10041-P) is acknowledged. Publisher Copyright: © 2021 Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - We present an experimental study of the thermo emf of a two-dimensional electron-hole system in a 21 nm HgTe quantum well in the presence of magnetic field. The first experimental observation of Nernst-Ettingshausen effect in a 2D semimetal is reported. The comparison between theory and experiment shows that the thermo emf is determined by two contributions: the diffusion and the phonon drag, with the latter contribution several times greater than the first. The conclusion is drawn about the important role of electron-hole scattering in the formation of both thermoelectric power mechanisms.

AB - We present an experimental study of the thermo emf of a two-dimensional electron-hole system in a 21 nm HgTe quantum well in the presence of magnetic field. The first experimental observation of Nernst-Ettingshausen effect in a 2D semimetal is reported. The comparison between theory and experiment shows that the thermo emf is determined by two contributions: the diffusion and the phonon drag, with the latter contribution several times greater than the first. The conclusion is drawn about the important role of electron-hole scattering in the formation of both thermoelectric power mechanisms.

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Thermo emf in a two-dimensional electron-hole system in HgTe quantum wells in the presence of magnetic field. The role of the diffusive and the phonon-drag contributions

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