【摘要】 采用Ｌａｒｓｅｎ谐振子算符代数运算与变分微扰相结合的方法，研究处于电磁场中量子阱内电子—体纵光学声子耦合系统的性质的温度依赖性，得到了有限温度下系统的自能．对ＧａＡｓ晶体的量子阱进行数值计算，结果表明，极化子的自能随阱宽及电场强度的增大而减小，随温度的升高而增大．当磁场强度Ｂ＜５１．５７Ｔ时，极化子的自能随磁场强度的增大而增大，当Ｂ＞５１．５７Ｔ时，极化子的自能随磁场强度的增大而减小．当Ｂ＝５１．５７Ｔ时，极化子的自能出现极值，相应的共振频率为ωｃ＝２．５８２５ω更多还原

【Abstract】 In this paper, the temperature dependence of the properties of electron bulk LO phonon interaction system in a quantum well within the electric magnetic fields along the growth axis, was studied by means of variational wave function and harmonic oscillator operator algebra method. The self energy of the system at a finite temperature was obtained. Numerical calculations for GaAs crystal show that the self energy of the polaron in a quantum well decreases with increasing of well width and electric field and increases with increasing of temperature. The self energy will increase with increasing of magnetic field for B <51 57 T , and it decreases with increasing of magnetic fiald for B >51 57 T . When B =51 57 T , the self energy of polaron occurs extreme value, the corresponding resonance frequency ω c=2 5825ω.更多还原