声子之间相互作用对半导体量子点中磁极化子性质的影响  

Influence of Interaction Between Phonons on Properties of Magnetopolarons in Semiconductor Quantum Dots

作　　者：张鹏[1] 肖景林[2] 

机构地区：[1]中国石油大学(北京)数理系,北京102249 [2]内蒙古民族大学物理系,通辽028043

出　　处：《Journal of Semiconductors》2005年第12期2350-2354,共5页半导体学报（英文版）

基　　金：国家自然科学基金(批准号:10347004);中国石油大学(北京)校长基金(2005)资助项目~~

摘　　要：研究了半导体量子点中磁极化子的性质.采用线性组合算符和微扰法,导出了半导体量子点中磁极化子的基态能量.在计及电子在反冲效应中发射和吸收不同波矢的声子之间相互作用时,讨论了对半导体量子点中磁极化子的基态能量的影响.通过数值计算表明,半导体量子点中磁极化子的基态能量随量子点的有效受限长度的减小而迅速增大,随磁场的增加而增加,对于弱磁场声子之间相互作用的影响不能忽略.The properties of the magnetopolaron in a semiconductor quantum dot are studied. The ground state energy of the magnetopolaron is derived by using a linear combination operator and the perturbation method. Considering the interaction between phonons of different wave vectors in the recoil process, the influence on the ground state energy of the magnetopolaron is discussed. Numerical calculations show that the ground state energy of magnetopolarons will increase strongly with a decrease in the effective confinement length of the quantum dots and will decrease with increasing magnetic field. For a weak magnetic field, the influence of the interaction between pbonons on the ground state energy of the magnetopolarons can not be ignored.

关 键 词：半导体量子点 磁极化子 声子之间相互作用 基态能量 

分 类 号：O471.1[理学—半导体物理]