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.
作者
解文方
陈传誉
XIE Wen-fang;CHEN Chuan-yu(Department of Physics,Guangzhou Normal University,Guangzhou 510400)
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。