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Electron-acoustic-phonon scattering and electron relaxation in two-coupled quantum rings

Authors
  • Piacente, G.
  • Hai, G. Q.
Type
Preprint
Publication Date
Jun 15, 2007
Submission Date
Jun 15, 2007
Identifiers
DOI: 10.1063/1.2748715
Source
arXiv
License
Unknown
External links

Abstract

Electron relaxation, induced by acoustic phonons, is studied for coupled quantum rings in the presence of external fields, both electric and magnetic. We address the problem of a single electron in vertically coupled GaAs quantum rings. Electron-phonon interaction is accounted for both deformation potential and piezoelectric field coupling mechanisms. Depending on the external fields, the ring radii and the separation between the rings, we show that the two different couplings have different weights and importance. Significant oscillations are found in the scattering rates from electron excited states to the ground state, as a function of either the geometry of the system or the external fields.

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