Abstract
The electric field induced energy shift and the polarizability of an electron in a quantum well are calculated, including the effects of the electron-phonon coupling, the finite barrier height and the difference of the electron effective mass inside and outside the well. Numerical results for the case of GaAs-Ga 0.6Al 0.4As quantum wells show a large influence of the finite barrier height and the difference of the electron effective mass on the energy shift and the polarizability. The corrections of the energy shift due to electron-phonon coupling are rather small in contrast to previous results.
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