磁场中强耦合束缚极化子的声子平均数的研究  

The study on the mean number of phonons of the strong-coupling bondage polarons in magnetic field

作　　者：程正则[1] 徐斌[2] 张耀耀[1] 

机构地区：[1]咸宁学院物理系,湖北咸宁437005 [2]华北水利水电学院,郑州450011

出　　处：《华中师范大学学报（自然科学版）》2008年第2期195-198,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(1017402410474025)

摘　　要：采用线形组合算符和么正变换方法研究了磁场对半导体量子点中强耦合磁极化子的影响.通过对晶体CdF2作数值计算,结果表明声子平均数nk→随温度的升高而增大,以及在温度不变时,量子点中强耦合束缚极化子的平均数随极化子的振动频率的增大而变小.The properties of strong-coupling magnetic polaron in the semiconductor quantum dot are investigated by the lineal combination operator and unitary transformation methods. Through calculating the crystal CdF2. the results indicate that with the temperature increasing, the mean phonon ^-n→k is increasing, and when the temperature is in invariability, the mean number of the strong-coupling bondage polarons is lessening with the frequency of the polaron vibration increasing in the quantum dot.

关 键 词：平均声子数 线性组合算符 强耦合 磁极化子 

分 类 号：TN304.055[电子电信—物理电子学]