量子棒中弱耦合磁极化子的平均声子数  

Mean Number of Phonons of Weak-coupling Magnetopolaron in Quantum Rods

作　　者：孙勇[1] 丁朝华[1] 陈玉芳[1] 肖景林[1] 

机构地区：[1]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2011年第1期6-9,共4页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金资助项目(10347004;10747002);内蒙古自然科学基金资助项目(20080404MS0109)

摘　　要：具有椭球边界量子棒经过坐标变换成球形边界的哈密顿量.采用线性组合算符和幺正变换的方法研究量子棒中弱耦合磁极化子的平均声子数随电子-声子耦合强度、椭球的纵横比的变化关系.数值计算,结果表明:量子棒中弱耦合磁极化子的平均声子数随电子-声子耦合强度的增加而增加,随椭球的纵横比的增加而减少.The Hamiltonian of a quantum rod with an ellipsoidal boundary is given after a coordinate transformation which can transform the boundary into a spherical one.The relations of mean number of phonons of weak-coupling magnetopolaron in quantum rods with the electron-phonon coupling strength and the aspect ratio of the ellipsoid are studied by using the liner combination operator and the unitary transformation method.Numerical calculations are performed and the results show that mean number of phonons of weak-coupling magnetopolaron in quantum rods will increase with increasing the electron-phonon coupling strength.It will increase with decreasing the aspect ratio of the ellipsoid.

关 键 词：量子棒 磁极化子 平均声子数 线性组合算符 

分 类 号：O469[理学—凝聚态物理]