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 journalArticlepeer-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 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 languageEnglish
Pages (from-to)2-6
Number of pages5
JournalLow Temperature Physics
Volume47
Issue number1
DOIs
Publication statusPublished - 1 Jan 2021

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