量子阱内磁极化子自陷能的温度关系

采用推广的Larsen微扰理论,在有限温度情况下,对量子阱内的电子体LO声子耦合系统进行研究,得到了磁极化子自陷能的解析表达式,并以GaAs量子阱为例,进行数值计算.结果表明,磁极化子自陷能随阱宽的增大而增大;随温度的变化受磁场的影响特别显著,“低磁场”时,磁极化子自陷能随温度升高而变大;“高磁场”时,却随温度的升高而变小

The Dependence of the Self-trapping Energy of a Magneto polaron in a Quantum Well on Temperature

The system of the electron bulk longitudinal optical (LO) phonon interaction in a semiconductor quantum well at finite temperatures has been studied and the analytical expression of the self trapping energy of the magneto polaron has been obtained by the method of the generalized Larsen perturbation theory.The numerical results show that the self trapping energy enhances with increasing of the width of the well,and depends strongly on the strength of the magnetic field.As temperature increases,the self trapping of magneto polaron will be strengthened in the low magnetic field range,but it will be weakened in the high magnetic field range.