Role of confinement shape and spin-orbit interactions on binding energy, temperature, transition energy, susceptibility and oscillator strength of an off-center D 0 impurity in a GaAs quantum dot

This study explores the influence of confinement potential shape on the behavior of an off-center D0 0 impurity in a quantum dot (QD). In this study, we use the power exponential potential and Rashba spin-orbit interaction (RSOI), and Dresselhaus spin-orbit interaction (DSOI) beside an external magnetic field. Employing the variational method, we obtained the ground and first excited state energies and corresponding binding energies, transition energy, and magnetic susceptibilities across various impurity positions, QD parameters, and potential shapes. We ascertain the stable temperature by equating the maximum binding energy of an off-center D0 0 system. Subsequently, we computed the oscillator strength (OS) and conducted a comparative analysis with existing literature. Our findings demonstrate an exciting behavior in response to changes in potential shape, QD parameters, and spin-orbit coupling strengths. It helps us better understand how an off-center impurity behaves with different potential shapes in QDs and helps engineers to design devices in spintronics.