磁场中的强耦合表面极化子(英文)  

Strong-coupling surface polaron in a magnetic field

作　　者：花修坤[1] 

机构地区：[1]苏州大学物理科学与技术学院 江苏苏州215006

出　　处：《苏州大学学报（自然科学版）》2005年第2期49-54,共6页Journal of Soochow University(Natural Science Edition)

基　　金：NaturaI Science Foundation of Nation(10204017)

摘　　要：应用变分法系统研究了电子和表面光学声子间的强相互作用,同时考虑了电子和体纵光学声子间的弱相互作用.给出了电子、声子间的基态和激发态的相互作用能.数值计算表明,电子和晶体表面的距离增大,体相互作用诱导势增大,而表面相互作用势减少;同时外磁场的作用可增大这两种相互作用的强度.By applying variational method, the strong electron-surface optical (SO) phonon interaction and the weak electron-longitudinal optical(LO) phonon interaction are studied systematically. The formula of induced energy Ve-SO, Ve-LO in both the ground and the excited states are given. The numerical results show that as the distance between the electron and the polar crystal surface increases, the electron-LO phonon interaction energy increases yet the electron-SO phonon interaction energy decreases. The numerical results also show that both electron-LO and electron-SO phonon interaction are enhanced as the magnetic field strength increases.

关 键 词：表面极化子 强耦合 表面光学声子 强相互作用 弱相互作用 纵光学声子 相互作用能 相互作用势 系统研究 晶体表面 电子 变分法 计算表 激发态 增大 外磁场 基态 距离 

分 类 号：O471.3[理学—半导体物理] O469[理学—物理]