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.
出处
《苏州大学学报（自然科学版）》
CAS
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)
