Off—Center D—Centers in a Quantum Dot in the Presence of a Perpendicular Magnetic Fields  

作　　者：XIEWen－Fang 

机构地区：[1]DepartmentofPhysics,GuangzhouUniversity,Guangzhou510405,China

出　　处：《Communications in Theoretical Physics》2001年第4期497-500,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：We investigate the effect of the position of the donor in quantum dots on the energy spectrum in the presence of a perpendicular magnetic field by using the method of few-body physics. As a function of the magnetic field, we find, when D<SUP>-</SUP> centers are placed sufficiently off-center, discontinuous ground-state transitions which are similar to those found in many-electron parabolic quantum dots. Series of magic numbers of angular momentum which minimize the ground-state electron-electron interaction energy have been discovered. The dependence of the binding energy of the ground-state of the D<SUP>-</SUP> center on the dot radius for a few values of the magnetic field strength is obtained and compared with other results.

关 键 词：D- center few-body physics quantum dot 

分 类 号：O471.1[理学—半导体物理]