半导体量子阱磁极化子能量和声子出现几率  

Magnetic polaron energy and the probability of phonon in the quantum well of the semiconductor

作　　者：张翠玲[1] 

机构地区：[1]重庆工商大学计算机科学与信息工程学院,重庆40067

出　　处：《四川大学学报（自然科学版）》2009年第4期1071-1076,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：重庆市教育委员会科学技术研究项目(KJ080720);重庆工商大学青年科学基金(0852013)

摘　　要：本文采用量子力学理论,计算了半导体量子阱中磁极化子的能量和波函数以及声子出现的几率,以 GaAs 为例,探讨了磁场和阱宽对磁极化子的能量和声子出现几率的影响.结果表明:磁极化子有α、β两态,这两种态中,能量和声子出现一个纵光学(LO)声子的几率随磁场和阱宽的变化而不同;在α态中,磁极化子的能量随磁场增大而线性减小,随阱宽的增大而非线性减小,出现一个 LO 声子的几率随磁场的增大而减小,随阱宽的增大而增大,而在β态中则相反;系统出现一个 LO 声子的几率非常的小(不到万分之一).In this paper,the magnetic polaron energy , distribution and wave function are observed based on the quantum theory, and the influence of magnetic filed and potential well width of CaAs are discussed. The result shows that the polaron have α and β state where the variety of the probability of longitudinal optical （LO） phonon with the magnetic field and the width of potential well are different. In α state, the magnetic polaron energy decreases linearly with the magnetic field and nonlinear decreases with the well width, and the probability of LO phonon state grows with the well width and decreases with the magnetic field. It is on the contrary in the β state. The probability of LO phonon state is very small （smaller than one billionth. ）.

关 键 词：半导体量子阱 磁极化子 能量 声子出现几率 磁场 

分 类 号：O481[理学—固体物理]