Low-Lying of a Negatively Charged Exciton X^(–) in Two-Dimensional Quantum Dots  

作　　者：XIE Wen-fang CHEN Chuan-yu 解文方;陈传誉(Department of Physics,Guangzhou Normal University,Guangzhou 510400)

机构地区：[1]Department of Physics,Guangzhou Normal University,Guangzhou 510400

出　　处：《Chinese Physics Letters》1998年第10期739-741,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19575012;the Excellent Young Teachers Foundation of the Universities in Guangzhou。

摘　　要：The Hamiltonian of a charged exciton X^(–)(trion)in a two-dimensional quantum dot with parabolic confinement has been diagonalized to obtain the low-lying eigenenergy values as a function of the dot size and the electron to hole effective mass ratio.The introduction of the transformation bracket for 2D harmonic oscillators facilitates the evaluations of Hamiltonian.By using this method,we have calculated the energies of the low-lying states of the charged exciton as a function of the massσand the radius of quantum dots.It is found that a charged exciton X^(–)in a quantum dot may have more than one bound states.Theoretical explanations derived from the first principles have been formulated.

关 键 词：QUANTUM DIAGONAL RADIUS 

分 类 号：O57[理学—粒子物理与原子核物理]