多原子晶体中强耦合表面极化子的声子平均数  

The Mean Number of Phonons of Strong Coupling Surface Polaron in a Polyatomic Crystals

作　　者：于毅夫[1] 尹辑文[1] 肖景林[2] 

机构地区：[1]赤峰学院物理系,内蒙古赤峰024000 [2]内蒙古民族大学物理与机电学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2003年第5期389-392,共4页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自然科学基金资助项目(200208020110)

摘　　要：研究多原子晶体中强耦合表面极化子的性质.采用Tokuda改进的线性组合算符和幺正变换方法导出了表面极化子的振动频率和声子平均数,讨论了多原子晶体中强耦合表面极化子的振动频率和声子平均数与拉格朗日乘子u和电子—声子耦合参数α的关系.结果表明:表面极化子的振动频率λ和声子平均数N随耦合参数α和拉格朗日乘子u的增加而增加.The properties of strong coupling surface polaron in a polyatomic crystals was studied.The vibrational frequency and the mean number of phonons of surface polaron are derived by using improved linear combination operator and unitary transformation method.The relation of the vibrational frequency and the mean number of phonons of strong coupling surface polaron in a polyatomic crystals to Lagrange multiplier u and electron-phonon coupling parameter α are discussed.The results show that the vibrational frequency λ and the mean number of phonons N of surface polaron will increase with increasing coupling parameter α and Lagrange multiplier u.

关 键 词：多原子晶体 强耦合 表面极化子 声子平均数 

分 类 号：O469[理学—凝聚态物理]