Polaron Ground State in a Double Heterostructure of Polar Crystals.

摘要

The ground-state energy and effective mass of a polaron in the GaAs well of a GaAs/AlAs double heterostructure are calculated as functions of the well width. In considering electron-phonon interactions, we have included both the confined LO as well as the interface phonon modes. The results differ qualitatively from what can be found in the literature, demonstrating the importance of interface modes as well as the confinement of LO modes.