Electron-phonon scattering at the intersection of two Landau levels

Details Electron-phonon scattering at the intersection of two Landau levels Electron-phonon scattering at the intersection of two Landau levels

2002-02-11

arxiv.org/abs/cond-mat/0202179v1

Phys. Rev. B 74, 085321 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 8 figures

Scientific paper

10.1103/PhysRevB.74.085321

We predict a double-resonant feature in the magnetic field dependence of the phonon-mediated longitudinal conductivity $\sigma_{xx}$ of a two-subband quasi-two-dimensional electron system in a quantizing magnetic field. The two sharp peaks in $\sigma_{xx}$ 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 mutually 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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