非对称抛物限制势量子点中强耦合束缚磁极化子的性质  

Properties of Strong Coupling Bound Magnetopolarons in Quantum Dots with Unsymmetrical Parabolic Confinement Potential

作　　者：陈时华[1] 肖景林[2] 

机构地区：[1]湖州职业技术学院理工分院,湖州313000 [2]内蒙古民族大学物理与机电学院,通辽028043

出　　处：《Journal of Semiconductors》2006年第11期1923-1926,共4页半导体学报（英文版）

基　　金：国家自然科学基金(批准号:10347004);内蒙古高校自然科学基金(批准号:NJ04059)资助项目~~

摘　　要：采用Pekar类型的变分方法研究了非对称抛物限制势作用下的量子点中强耦合束缚磁极化子的性质.导出了束缚磁极化子的基态束缚能、光学声子平均数.通过数值计算表明,量子点中强耦合束缚磁极化子的基态束缚能和光学声子平均数均随量子点的横向受限强度、纵向受限强度的增加而增大,随回旋频率的增加而增大.基态束缚能随库仑束缚势的增加而增大.The properties of a bound magnetopolaron with electron-LO-phonon strong-coupling in quantum dots with an unsymmetrical parabolic confinement potential are investigated using the Pekar type variational method. The ground state binding energy and the average number of virtual phonons around the electron of the bound magnetopolaron are derived. Numerical calculations indicate that both the ground state binding energy and the average number of virtual phonons around the electron increase with increasing lateral confinement strength, longitudinal confinement strength, and cyclotron frequency. Numerical calculations also indicate that the ground state binding energy increases with increasing coulomb potential.

关 键 词：量子点 强耦合 束缚磁极化子 受限强度 

分 类 号：O471.1[理学—半导体物理]