Abstract
We present a first theoretical study of how phonon drag patterns of AlAs quantum wells change as function of well thickness and valley occupancy. Our numerical simulations include the phonon focusing, the acoustic anisotropy of the electron-phonon coupling and the conduction-band anisotropy. From such an analysis, in connection with future systematic experimental studies, one can draw information about the effective mass and the electron-phonon coupling parameters. A comparison of our numerical results with a first experimental drag image of an AlAs well shows very good agreement. The main features of the experimental image can be explained.
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