声子色散对极性晶体中磁极化子基态能量的影响  

The influence of phonon dispersion on the ground- state energy of magnetopolaron in a polar crystal

作　　者：杨洪涛[1] 冀文慧[1] 冯有良[1] 胡文弢[1] 

机构地区：[1]内蒙古集宁师范学院物理系,乌兰察布012000

出　　处：《原子与分子物理学报》2016年第2期335-338,共4页Journal of Atomic and Molecular Physics

基　　金：内蒙古自治区高等学校科学研究项目(NJZY12248);集宁师范学院科学研究项目(jsky2015044)

摘　　要：利用线性组合算符和幺正变换相结合的方法,研究了声子色散对极性晶体中磁极化子基态能量的影响.计及纵光学(LO)声子色散,在抛物近似下导出了极性晶体中磁极化子基态能量随电子-纵光学声子耦合常数、回旋共振频率和声子色散系数的变化关系.数值计算结果表明磁极化子基态能量随声子色散系数和电子-纵光学声子耦合常数的增大而减小,随回旋共振频率增大而增大.The influence of the phonon dispersion on the ground - state energy of the magnetopolaron in a polar crystal was studied by using the linear combination operator and unitary transformation method. Taking account of the longitudinal optical （LO） phonons dispersion in a parabolic approximation, the ground state energy of the magnetopolaron in a polar crystal as a function of the coefficient of the phonon dispersion, the electron - LO - phonon coupling constant and the cyclotron resonance frequency are obtained. Numerical calculation results show that the ground state energy decreases with increasing the coefficient of the phonon dispersion and the electron - LO -phonon coupling constant, and increases with increasing the cyclotron resonance freauencv.

关 键 词：光电子学 磁极化子 线性组合算符 声子色散 基态 

分 类 号：O469[理学—凝聚态物理]