表面极化子的基态能量

Property of 2─ D optical polaron

本文研究极性晶体中表面电子与在面光学声子相互作用的性质，采用微扰法导出表面极化子的基态能量．在计及反冲效应中不同波矢的声子之间的相互作用时，讨论对表面极化子性质的影响，结果表明，反冲效应中不同波矢的声子之间的相互作用对表面极化子的自陷能的影响随耦合常数ａ＿ｓ的增加而加大．

In this paper, some properties of the interaction between the surface electron and surface optical phonon in polar crystals are studied.The ground state energy of the sur-face polaron is derived by a perturbation method. When we consider the interaction between phonons of different wave vector in the recoil process,the influence on the properties of the surface polaron is discussed. The results illustrates that the interaction between phonons of different wave vector in the recoil process the influence on the self-trapping energy of the surface polaron will increase with increasing coupling constant α_s.