External electric field, hydrostatic pressure and temperature effects on the binding energy of an off-center hydrogenic impurity confined in a spherical Gaussian quantum dot

Based on the effective-mass approximation within a matrix diagonalization scheme, simultaneous effects of external electric field, hydrostatic pressure and temperature on the binding energy of an off-center hydrogenic donor confined by a spherical Gaussian potential have been calculated. The binding energy dependencies on the dot radius, the potential depth, the impurity position, the electric field strength, the hydrostatic pressure and the temperature are reported. We found that, not only the internal parameters (such as: the dot radius, the potential depth and the impurity position) but also the external perturbations (such as: electric field strength, hydrostatic pressure and temperature) have a great influence on the impurity binding energy.