Simultaneous Effects of HydrostaticPressure and Conduction Band Non-parabolicity on BindingEnergies and Diamagnetic Susceptibility of a Hydrogenic Impurityin Spherical Quantum Dots |
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Authors: | G. Rezaei N.A. Doostimotlagh B. Vaseghi |
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Affiliation: | 1.Department of Physics, College of Sciences, Yasouj University, Yasouj 75914-353, Iran;2.Young Research Club, Islamic Azad University, Yasouj Brach, Yasouj, Iran |
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Abstract: | Simultaneous effects of conduction band non-parabolicity and hydrostatic pressure on the binding energies of 1S, 2S, and 2P states along with diamagnetic susceptibility of an on-center hydrogenic impurity confined in typical GaAs/AlxGa1-xAs spherical quantum dots are theoretically investigated using the matrix diagonalization method. In this regard, the effect of band non-parabolicity has been performed using the Luttinger-Kohn effective mass equation. The binding energies and the diamagnetic susceptibility of the hydrogenic impurity are computed as a function of the dot radius and different values of the pressure in the presence of conduction band non-parabolicity effect. The results we arrived at are as follows: the incorporation of the band edge non-parabolicity increases the binding energies and decreases the absolute value of the diamagnetic susceptibility for a given pressure and radius; the binding energies increase and the magnitude of the diamagnetic susceptibility reduces with increasing pressure. |
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Keywords: | non-parabolic conduction band hydrostatic pressure quantum dots hydrogenic impurity diamagnetic susceptibility |
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