The effects of the dielectric screening, temperature, magnetic field, and the structure dimension on the diamagnetic susceptibility and the binding energy of a donor-impurity in quantum disk

Abstract

Through the present work, we investigated the dielectric screening, temperature and applied magnetic field on donor-impurity diamagnetic susceptibility and binding energy in quantum disk (QDisk) made out of GaAs. Moreover, the influence of the position, hydrostatic pressure, temperature, and magnetic field on the dielectric screening function and the diamagnetic coefficient are also reported. The calculations are performed within the effective-mass theory using variational approach considering an infinite potential barrier. Our results reveal that the variation of QDisk's dimension, temperature, magnetic field and pressure have a considerable impact on diamagnetic susceptibility and binding energy, diamagnetic coefficient (DC) and dielectric screening. It is found that the magnetic field increase the diamagnetic susceptibility and binding energy while the temperature and dielectric screening reduce the diamagnetic susceptibility and improve the binding energy. We hope that the present work exhibits a modest contribution for further theoretical research on GaAs-based nanostructures.