半导体量子点中强耦合磁极化子的性质  

Properties of Strong-Coupling Magnetopolaron in Semiconductor Quantum Dot

作　　者：王立国[1] 肖景林[1] 李树深[2] 

机构地区：[1]内蒙古民族大学物理系,通辽028043 [2]中国科学院半导体研究所半导体超晶格国家重点实验室,北京100083

出　　处：《Journal of Semiconductors》2004年第8期937-941,共5页半导体学报（英文版）

基　　金：国家自然科学基金;内蒙古自然科学基金 (批准号 :2 0 0 2 0 80 2 0 110 )资助项目~~

摘　　要：采用线形组合算符和么正变换研究了磁场对半导体量子点中强耦合磁极化子基态的影响 .结果表明 ,磁极化子束缚能、磁极化子振动频率随有效束缚强度增大而减小 ,随电子 -体纵光学声子耦合强度增大而增大 ,随磁场强度增大而增大 ,即均由于半导体量子点的受限和磁场的增大而使量子点的极化加强 。The properties of strong coupling magnetoploron in the semiconductor quantum dot are investigated by the linear combination operator and unitary transformation methods.The results show that the magnetopolaron binding energy decreases with increasing the effective confinement length,enlarges with increasing the electron phonon coupling strength,and enhances with enlarging the cyclotron resonant frequency.Furthermore,the resonant frequency of strong coupling magnetopolaron in the semiconductor quantum dot decreases with increasing the effective confinement length,enlarges with increasing the electron phonon coupling strength,and enhances with enlarging the cyclotron resonant frequency.So the polaronic effects can not be ignored in the semiconductor quantum dot.

关 键 词：磁场 半导体量子点 强耦合 线形组合算符 

分 类 号：TN304.055[电子电信—物理电子学]