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

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

Research output: Contribution to journal › Article › peer-review

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 contribu-tion several times greater than the first. The conclusion is drawn about the important role of electron-hole scat-tering in the formation of both thermoelectric power mechanisms.

Original language	English
Pages (from-to)	5-10
Number of pages	6
Journal	Fizika Nizkikh Temperatur
Volume	47
Issue number	1
Publication status	Published - Jan 2021

Keywords

2D semimetal
Diffusion
Phonon drag
Quantum well

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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 contribu-tion several times greater than the first. The conclusion is drawn about the important role of electron-hole scat-tering in the formation of both thermoelectric power mechanisms. ",

keywords = "2D semimetal, Diffusion, Phonon drag, Quantum well",

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 E. B. Olshanetsky, Z. D. Kvon, G. M. Gusev, M. V. Entin, L. I. Magarill, and N. N. Mikhailov. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = jan,

language = "English",

volume = "47",

pages = "5--10",

journal = "Fizika Nizkikh Temperatur",

issn = "0132-6414",

number = "1",

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

In: Fizika Nizkikh Temperatur, Vol. 47, No. 1, 01.2021, p. 5-10.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

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 E. B. Olshanetsky, Z. D. Kvon, G. M. Gusev, M. V. Entin, L. I. Magarill, and N. N. Mikhailov. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1

Y1 - 2021/1

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 contribu-tion several times greater than the first. The conclusion is drawn about the important role of electron-hole scat-tering 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 contribu-tion several times greater than the first. The conclusion is drawn about the important role of electron-hole scat-tering in the formation of both thermoelectric power mechanisms.

KW - 2D semimetal

KW - Diffusion

KW - Phonon drag

KW - Quantum well

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M3 - Article

AN - SCOPUS:85100175548

VL - 47

SP - 5

EP - 10

JO - Fizika Nizkikh Temperatur

JF - Fizika Nizkikh Temperatur

SN - 0132-6414

IS - 1

ER -

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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