Binding Energies of D^- Centers Trapped by a Quantum Dot in a Magnetic Field  

作　　者：XIE Wen-Fang 

机构地区：[1]School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China

出　　处：《Communications in Theoretical Physics》2009年第4期748-750,共3页理论物理通讯（英文版）

基　　金：supported by National Natural Science Foundation of China under Grant No. 10775035

摘　　要：A investigation of the properties of the bound states of D^- centers confined in a parabolic quantum dot has been performed for the case with the presence of a perpendicular magnetic field. Calculations are carried out by using the method of numerical diagonalization of Hamiltonian matrix within the effective-mass approximation. The binding energies of the ground and some bound-excited states are obtained as a function of the applied magnetic field strength. Detailed calculations of the binding energies for a number of low-lying states show that for field strength less than B = 2.1 T, the D center confined in a quantum dot possesses two bound states, for 2.1 〈 B 〈 2.4 T, there exist three bound states, etc. Further relevant characteristics of the D- center quantum dots in magnetic fields are provided.

关 键 词：quantum dots DONOR 

分 类 号：O471.1[理学—半导体物理] TM153.5[理学—物理]