非对称半指数量子阱中强耦合极化子振动频率  

Vibrational frequency of strong-coupling polaron in asymmetrical semi-exponential quantum well

作　　者：张建芳[1] 肖景林[1] ZHANG Jianfang;XIAO Jinglin(Institute of Condensed Matter Physics,Inner Mongolia University for Nationalities,Tongliao 028043,China)

机构地区：[1]内蒙古民族大学凝聚态物理研究所,内蒙古通辽028043

出　　处：《量子电子学报》2020年第6期699-703,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金,11464033;内蒙古自治区高校科学研究项目,NJZY13324。

摘　　要：采用Huybrechts线性组合算符和第二次Lee-Low-Pines (LLP)幺正变换方法研究了非对称半指数量子阱中强耦合极化子的性质。得到了RbCl非对称半指数量子阱中强耦合极化子的振动频率和基态能量,并理论上导出了振动频率和基态能量随受限势的两个正参量(U0和σ)的变化关系。选择RbCl晶体材料进行数值计算,研究结果表明:U0和σ是研究非对称半指数量子阱中极化子性质的重要物理量,非对称半指数量子阱的振动频率和基态能量随U0的增加而增大,随σ的增加而减少。By using Huybrechts′ linear combination operator and the second Lee-Low-Pines(LLP)unitary transformation method, the properties of the strong-coupling polaron in RbCl asymmetrical semiexponential quantum well are investigated. The vibrational frequency and ground state energy of the strong-coupling polaron in a RbCl asymmetrical semi-exponential quantum well are obtained, and the variation of the vibrational frequency and ground state energy with the two positive parameters(U0 and σ) of the asymmetrical semi-exponential confinement potential is derived theoretically. RbCl crystal material is selected for numerical calculation, and the results indicate that U0 and σ are important physical quantities for investigating the properties of the strong-coupling polaron in asymmetrical semiexponential quantum well, and the vibrational frequency and ground state energy of the strong-coupling polaron increase with the increase of U0, while decrease with the increase of σ.

关 键 词：光电子学 非对称半指数量子阱 线性组合算符 强耦合极化子 振动频率 基态能量 

分 类 号：O469[理学—凝聚态物理]