Effect of Magnetic Field and Shell Thickness on Binding Energies of a ZnSe/ZnS Core Shell Quantum Dot

Abstract

We investigated the effect of external magnetic field and shell thickness on the binding energies of a ZnSe/ZnS core shell quantum dot. The binding energies were calculated using the variational method within the effective mass approximation and confinement potential. The binding energy of the 2s and 2p+ states was found to increase with magnetic field. However, the 2p0 state was found to be independent of the magnetic field at a shell thickness of 0.5 nm. Degeneracy of the lifted 2p states was found to occur. The results also showed that the electron binding energy increases at the outset with the increasing shell thickness, and at larger shell thicknesses, the binding energy saturates. The binding energy was found to be decreasing with increasing core diameter and becomes appreciably smaller at core radius of 0.42 nm. The observed results were compared with the previously reported results.