Electron-phonon scattering at the intersection of two Landau levels
Physical Review B - Condensed Matter and Materials Physics
American Physical Society
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.
Copyright © 2006 The American Physical Society
Vol. 74 (8), article 085321