Thermal generation of shift electric current

It is shown that the dissipation of energy in an electron gas confined in a quantum well made of non-centrosymmetric crystal leads to a direct electric current. The current originates from the real-space shift of the wave packets of Bloch electrons at the electron scattering by phonons, which tends...

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Bibliographic Details
Published in:New journal of physics 2020-01, Vol.22 (1), p.13005
Main Authors: Budkin, G V, Tarasenko, S A
Format: Article
Language:English
Subjects:
2d electron gas
Asymmetry
Electric currents
Electron gas
electron-phonon interaction
Electrons
Energy dissipation
Equilibrium
Phonons
Physics
Quantum wells
shift current
Subsystems
Symmetry
Wave packets
Zincblende
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Summary:It is shown that the dissipation of energy in an electron gas confined in a quantum well made of non-centrosymmetric crystal leads to a direct electric current. The current originates from the real-space shift of the wave packets of Bloch electrons at the electron scattering by phonons, which tends to restore thermal equilibrium between the electron and phonon subsystems. We develop a microscopic theory of such a phonogalvanic effect for narrow band gap zinc-blende quantum wells.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ab64af