OAM-RC

Abstract

Calculations of the hydrogenic impurity discrete states in the partially closed spherical semiconductor core-shell quantum antidot (QAD) are performed under effective mass approximation. On the basis of the analytical solutions of the Scrödinger and Poisson equations for multilayered quantum antidot (MLQAD) with hydrogenic impurity located in the center, energies of an electron bound states in closed part of potential and corresponding wave functions are determined. Particular core/shell/surrounding medium nanoheterosystem under investigation is CdTe/ZnTe/CdTe MLQAD. ZnTe shell forms potential barrier. The influence of increasing core and shell size on the ground state (1s) energy and corresponding radial probabilities are presented in this paper. For small core radius 1s orbital expands out of the shell with energy just below the bottom of the outer material conduction band i.e. core material in this particular case. When core radius increases, at characteristic radius value, 1s orbital contracts into the core region and the ground state energy decreases. For very large core radius, energy of 1s state reaches constant value, characteristic for bulk core material..

Keywords

Core-shell quantum dot, Quantum antidote, Hydrogenic impurity, Electron localization.

Citation

D. STOJANOVIĆ, R. KOSTIĆ, Influence of heterostructure on electron localization in the CdTe/ZnTe/CdTe spherical core-shell quantum antidot with hydrogenic impurity in the center, Optoelectronics and Advanced Materials - Rapid Communications, 9, 7-8, July-August 2015, pp.1000-1005 (2015).

Submitted at: March 7, 2014

Accepted at: June 24, 2015