Combined effects of hydrostatic pressure and temperature on diamagnetic susceptibility, dipole moment and optical band gap properties of Hemi-Quantum Ring: Presence of a single off-center donor atom

Abstract

In this study, we have investigated the combined influence of hydrostatic pressure and temperature on the electronic and optical properties of an electron and a off-center atom confined in a Hemi Quantum Ring. To analyze the system, we employed the finite difference method, considering the effective mass approximation and an infinite confinement potential. Our study examines the permanent dipole moment and diamagnetic susceptibility under the influence of the donor atom’s position, temperature, and applied hydrostatic pressure in the three directions Rg, Rc and φ0. Our results reveal that the permanent dipole moment increases as the geometric confinement decreases, while the diamagnetic susceptibility exhibits a negative behavior and is influenced by temperature and hydrostatic pressure. Furthermore, we observed that the bandgap and the optical bandgap are sensitive to variations in temperature and the size of the HQR (Hemi Quantum Ring) nanostructure. The study on the combined influence of hydrostatic pressure and temperature on the electronic and optical properties of an electron and an off-center atom confined in a Hemi Quantum Ring has potential real-world applications in the development of electronic and optical devices.