Temperature effect on impurity-bound polaronic energy levels in a GaAs parabolic quantum dot

Energy levels of an impurity atom and its binding energy in a GaAs parabolic quantum dot (QD) are obtained by the second-order Rayleigh-Schrodinger perturbation theory, taking into account of the electron-bulk LO-phonon interaction. The binding energy of the ground state and the low-lying excited state is expressed as a function of the temperature and the effective confinement length of the QD. It is found that the binding energy is a decreasing function of temperature, and the temperature effect becomes obvious in small quantum dots (QDs).