Electron-phonon scattering at the intersection of two Landau levels

V. N. Golovach and M. E. Portnoi
Phys. Rev. B 74, 085321 – Published 29 August 2006

Abstract

We predict a double-resonant feature in the magnetic field dependence of the phonon-mediated longitudinal conductivity σxx of a two-subband quasi-two-dimensional electron system in a quantizing magnetic field. The two sharp peaks in σxx appear when the energy separation between two Landau levels belonging to different size-quantization subbands is favorable for acoustic-phonon transitions. One-phonon and two-phonon mechanisms of electron conductivity are calculated and compared. The phonon-mediated interaction between the intersecting Landau levels is considered and no avoided crossing is found at thermal equilibrium.

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  • Received 1 March 2006
  • Accepted 19 July 2006

DOI:https://doi.org/10.1103/PhysRevB.74.085321

©2006 American Physical Society

Authors & Affiliations

V. N. Golovach*

  • School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom

M. E. Portnoi

  • International Center for Condensed Matter Physics, Universidade de Brasília, 70919-970 Brasília-DF, Brazil and School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom

  • *Present address: Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. Electronic address: vitaly.golovach@unibas.ch
  • Electronic address: m.e.portnoi@exeter.ac.uk

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Issue

Vol. 74, Iss. 8 — 15 August 2006

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