Lyudvig A. Vardanyan

Impurity-Bound Polaronic States in ZnSe Quantum Dots Under Electric Field: Image Charge Effect

A Landau–Pekar variational approach is used to study the ground and first excited states of an impurity-bound polaron in a ZnSe quantum dot under an external electric field, by taking into account the image charge effect (ICE). The binding energy (BE) of the donor impurity is calculated considering the interaction of an electron with both the bulk-type longitudinal optical phonons and the interface optical phonons. Both electric field and parabolic confinement effects on the BE and its polaronic shift for 1s and 2s hydrogen-like states with and without ICE are investigated in detail. We have shown that the ICE strongly reduces the donor BEs in both ignoring and considering electron–optical phonon interaction.