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    The effective Hamiltonian of the exeiton in devired by a perturbation. The effective Hamiltonian of the exeiton not only includes the Coupling contribution between electron and the different LO phonon branches,but also exists an extra contribution due to crossed terms between the different branches.
    采用微扰法,导出了激子的有效哈密顿量,其中包括不同支 LO 模与电子耦合的贡献,而且还存在不同支 LO 模间相互作用所贡献的附加项。
    For weak —coupling,we obtain the usual result that the ground state energy is the sum of the contribution of different phonon branches. For strong—coupling there is an extra contribution due to crossed terms between different branches.
    发现,对于弱耦合,耦态能量是不同支 LO 模能量的和,而对于强耦合,则存在由不同支LO 模之间交叉项贡献的附加能量。
    For weak coupling,we obtain the usual result that the groung state energy is the sum of the contribution of different phonon branches. For strong coupling,there is an extra contribution due to crossed terms between the different branches.
    对于弱耦合得到基态能量是不同支声子能量的和的通常结果,对于强耦合存在一个由于不同支声子之间的交叉项贡献的附加能量。
    The ground state energy of the system, which is the electron - phonons weak - coupling in a polar crystal slab, are studied by means of the linear combination operator and variational method. The change of the self - trapping energy of the polaron changing with the thickness and the coupling constants of the slab is derived. For GaAs crystal slab, the contributions of different branches phonon - electron interaction of the self - trapping energy of the polaron are calculated.
    本文采用Huybrechts线性组合算符和变分法相结合的方法,研究了极性晶体膜内电子-声子弱耦合系统的基态能量,得到了作为膜厚和耦合常数函数的极化子的自陷能,对GaAs晶体计算了不同支声子与电子相互作用对极化子自陷能的贡献。
    For CdF\-2 semiconductor,the contributions of different branches phonon\|electron interaction on the effective mass and self\|trapping\|energy of the polaron are calculated.
    对 Cd F2 半导体 ,计算了不同支声子与电子的相互作用对极化子有效质量和自陷能的贡献
    Numerical results of the effective mass and the vibration frequency of the polaron for KI/AgCl/KI QW show that the vibration frequency and the effective mass of the polaron decrease with increasing well's width and temperature, but the contribution of the interaction between the electron and the different branches of phonons to the effective mass and the vibration frequency and the change of their variation with the well's width and temperature are greatly different.
    对KIAgClKI量子阱进行了数值计算,结果表明,极化子的振动频率和有效质量随阱宽的增加而减小、随温度的升高而减小,但不同支声子与电子相互作用对极化子的振动频率和有效质量的贡献以及它们随阱宽和温度的变化情况大不相同.
    Our numerical results for a CdF_2/AgCl QW show that the vibration frequency and the self-trapping energy of the magnetopolaron decrease with increasing well width and increase with increasing magnetic fields strength,but the contribution of interaction between the different branches of phonons and the electron and the magnetic fields to the vibration frequency and the self-trapping energy of the magnetopolaron are greatly different.
    对CdF2/AgCl量子阱进行了数值计算,结果表明,磁极化子的振动频率和自陷能随阱宽的增加而减小,随磁场的增加而增大,但不同支声子与电子和磁场相互作用对磁极化子的振动频率和自陷能的贡献大不相同.
 

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