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Abstract
The relaxation of holes in GaAs-AlGaAs quantum wells by emission of acoustic phonons via deformation potential coupling is calculated. Using the 4*4 Luttinger Hamiltonian and the Bir-Pikus Hamiltonian to describe the hole dispersion and the coupling to acoustic phonons the authors take into account the coupling of light and heavy holes. They find a distinct angular dependence of the hole relaxation which is mainly due to the anisotropy of the phonon dispersion and the coupling mechanism. The results confirm the predominance of parity-conserving processes and incomplete hole-spin relaxation derived from luminescence experiments.
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