Abstract
Intervalley electron scattering by phonons in (AlAs)1(GaAs) 3(001) superlattices is studied using the pseudopotential method and a phenomenological model of the bonding forces. The deformation potentials between the conduction band extrema of the superlattice involving short-and long-wavelength phonons are calculated. It is shown that the mixing of states from the zinc-blende L valleys plays a greater role in intervalley scattering in a superlattice than the Γ-X mixing. In particular, due to L-L mixing, the Γ-X 3 transitions, analogous to Γ-L transitions in zinc blende, have higher intensities than the analogues of Γ-X transitions (Γ1-M 5 and (Γ1-Γ3 transitions). The deformation potentials averaged over the scattering channels in the superlattice agree with the corresponding potentials in a solid solution, but all transitions in the superlattice have higher intensities for the lower states.
Original language | English |
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Pages (from-to) | 129-138 |
Number of pages | 10 |
Journal | Physics of the Solid State |
Volume | 48 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2006 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials