Physics of nanosystems ground and excited states of D0 and D- Donors in a spherical quantum dot

Abstract

For the spherical nanoheterostructure Si/SiO2 in the approximation of effective mass for nondegenerated bands, we calculated the energies of the ground and excited states of the electrons of neutral (D0) and negatively charged (D−) donors as functions of the radius of a quantum dot, on the basis of the exact solution of the Poisson and Schr¨odinger equations. The singlet and triplet states for D− donor are determined, and the dependence of the energies of the ground states of D0 and D− donors on the dielectric permittivity of the matrix is studied.