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在一维等效模型下采用有效差分法对抛物型量子阱线中带电激子的束缚能进行了计算,分析了约束势以及磁场对带电激子束缚能的影响,并对带正电激子(X+)和带负电激子(X-)的情况进行了比较.结果表明:电子和空穴的振子强度对带电激子的稳定性有重要影响,X+的束缚能不总是比X-的大,随着空穴振子强度的增加束缚能的函数曲线将会出现交叉,这同实验得到的结果符合;磁场的存在会增加粒子间的束缚,并且磁场对束缚能的影响同振子强度大小有关.
In the one-dimensional equivalent model, the effective difference method is used to calculate the binding energy of charged excitons in the parabolic quantum well line. The influence of the confinement potential and the magnetic field on the bound energy of the charged exciton is analyzed. (X +) and negatively charged excitons (X-). The results show that the oscillator strengths of electrons and holes have an important influence on the stability of charged excitons, and the binding energy of X + is not always better than that of X- Large, as the hole oscillator strength increases the binding function curve will cross, which is consistent with the experimental results; the existence of a magnetic field will increase the binding between the particles, and the impact of the magnetic field on the binding energy with the strength of the oscillator .