Simultaneous Effects of Hydrostatic Pressure and Conduction Band Non-parabolicity on Binding Energies and Diamagnetic Susceptibility of a Hydrogenic Impurity in Spherical Quantum Dots  

作　　者：G.Rezaei N.A.Doostimotlagh B.Vaseghi 

机构地区：[1]Department of Physics,College of Sciences,Yasouj University [2]Young Research Club,Islamic Azad University

出　　处：《Communications in Theoretical Physics》2011年第8期377-381,共5页理论物理通讯（英文版）

摘　　要：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/Alx- Ga1-x As spherical quantum dots are theoretically investigated using the matrix diagonalization method. In this regard, the effect of band non-parabolieity 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.

关 键 词：non-parabolic conduction band hydrostatic pressure quantum dots hydrogenic impurity diamagnetic susceptibility 

分 类 号：O482.5[理学—固体物理]