Effect of Rashba and Dresselhaus spin-orbit interactions on the ground state properties of a D < sup > 0 < /sup > impurity in a Gaussian GaAs quantum dot placed in a magnetic field

Abstract

The ground state energy and binding energy of a hydrogenic donor impurity (D0) in a three-dimensional GaAs quantum dot with Gaussian confinement is calculated variationally incorporating the effect of Rashba and Dresselhaus spin-orbit interactions in the presence of an external magnetic field. The results show that the Rashba spin-orbit interaction and the strength of the confinement potential reduce the ground state energy of the donor impurity, whereas the magnetic field enhances them. Interestingly, the Dresselhaus spin-orbital interaction enhances the binding energy of the impurity in the presence of a magnetic field.