Abstract
The effect of polarization charges on energy of univalent and bivalent donors in a spherical quantum dot
Highlights
Intensive investigations of impurity states in different nanoscale systems have been reported in fundamental and applied publications for the recent 20 years
For a univalent impurity in a spherical quantum dots (QDs), exact solutions of the Schrodinger equation are obtained with extension over the Coulomb potential interaction of particles
The Calculated results reveal that the values of quantum levels of a confined electron in a spherical QD can be quite different for the cases with finite and infinite well heights
Summary
Intensive investigations of impurity states in different nanoscale systems have been reported in fundamental and applied publications for the recent 20 years. The effect of polarization charges of nanoheterostructure surface on the energy of a quasiparticle is investigated [12,13,14] In these papers for heterosystems of different nature a presence of the bound surface charges at the separation boundary is taken into account with the help of potential of forces of electrostatic images. A theoretical study of the effect of polarization charges arising at the interface of the media on energy levels of a bivalent donor, as the simplest among polyvalent ones, that is dependent on QD sizes will be important for further detailed research of donors. The work is aimed at determining the ground donor state energy of a univalent and a bivalent impurities in a spherical quantum dot with regard to polarization charges arising at the interface, taking into account both the existence and the absence of a transitional layer. Specific calculations are performed for the β-HgS/CdS nanoheterostructure
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