非对称量子点磁极化子激发态温度效应  

TEMPERATURE EFFECT ON FIRST EXITED STATE OF STRONG-COUPLING MAGNETIC POLARON IN AN ASYMMETRY QUANTUM DOT

作　　者：萨仁高娃[1] 阿其夫 孙勇[1] 蔡春雨[1] 肖景林[1] 

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 [2]通辽市产品质量计量检测所,内蒙古通辽028000

出　　处：《低温物理学报》2015年第5期414-417,共4页Low Temperature Physical Letters

基　　金：内蒙古民族大学资金(批准号:NMD1309)资助的课题~~

摘　　要：本文采用线性组合算符,幺正变换和量子统计理论相结合的方法,研究了非对称量子点中强耦合磁极化子的激发态能量和跃迁频率随横向和纵向受限强度ω1、ω2、回旋频率ωc和温度T的变化关系.选择RbCl晶体进行数值计算,结果表明:在较低的温度区域,第一激发态能量和跃迁频率随温度的升高而减小,在较高的温度区域,随温度的升高而增大.同时,第一激发态能量和跃迁频率随横向和纵向的受限强度和回旋频率的增加而增大.The temperature effect on first exited state of strong-coupling magnetic polaron in an asymmetry quantum dot are studied by using an linear combination operator and the unitary transformation methods. The relations of the first exited state and the transition frequency with the effective confinement strength, the cyclotron frequency and the temperature are investigated. Selecting RhCI quantum dot, numerical calculations are performed and the results show that the first exited state and the transition frequency decreases （increases） with increasing temperature when the temperature is in lower （higher） temperature regime. The first exited state and the transition frequency are increasing functions of the effective confinement strength, the cyclotron frequency.

关 键 词：非对称量子点 线性组合算符 极化子 温度效应 

分 类 号：O471.1[理学—半导体物理]