多原子极性晶体中表面磁极化子的内部激发态  

Internal Excited State of the Surface Magnetopolaron in Polyatomic Polar Crystals

作　　者：许战胜 张鹏[2] 肖景林[2] 

机构地区：[1]内蒙古赤峰电视大学,内蒙古赤峰024000 [2]内蒙古民族大学,内蒙古通辽市028043

出　　处：《发光学报》2002年第4期347-351,共5页Chinese Journal of Luminescence

基　　金：内蒙古自然科学基金资助项目(99009)

摘　　要：研究多原子极性晶体中表面磁极化子的内部激发态的性质,采用线性组合算符和幺正变换方法计算多原子极性晶体中表面磁极化子的第一内部激发态的能量。With the development of solid science theory and experimental technology, the properties of surface magnetopolaron in crystals have been of considerable interest. Many investigators studied the properties of surface magnetopolaron by means of various theoretical methods. Larsen proposed a novel fourth-order perturbation method to investigate the properties of 2D magnetopolaron. Wei and co-workers calculated the induced potential and the self-energy of an interface magnetopolaron interacting with bulk LO phonons as well as interface-optical phonons using the Green-function method. The properties of surface magnetopolaron in semiconductor CdF2 and CdTe were investigated by means of a linear combination operator and a perturbation method by one of the authors.Most polar crystals are diatomic and cubic and their crystal structure belongs to NaCl, CsCl or ZnS type. In these crystals there is one mode of the longitudinal optical(LO) phonon. The properties of crystals have been studied by a great variety of techniques, in the case, of crystals having only one LO phonon branch. However, a large number of polar crystals, with several atoms per unit cell, have more than one LO phonon branch. For example, in cuprite such as CuO2, GaAx1-xPx and a large number of perovskites (SrTiO3,BaTiO3, LiNbO3 ) there are more than two modes. In recent years, the problem with many LO phonon branches has been investigated. The ground state energy of surface magnetopolaron in polyatomic polar crystals are calculated using linear combination operator method by one of the authors.In the early 1970s, Huybrechts investigated the internal excited state of the bulk optical polaron by using linear combination operator method. Gu et al. apply the Larsen method to investigate the properties of the ground-and excited-state energies of a magnetopolaron in a quantum well and in a slab of polar crystal. Kandemir et al. discussed the ground-state and first-excited state energy of two-dimensional large magnetopolaron by using recently introduced squeezed

关 键 词：多原子极性晶体 表面磁极化子 内部激发态 线性组合算符 幺正变换 

分 类 号：O471.3[理学—半导体物理] O731[理学—物理]