English

应用科学学报 ›› 1986, Vol. 4 ›› Issue (3): 226-230.

• 论文 • 上一篇    下一篇

声子色散对激子的影响

顾世洧   

  1. 内蒙古大学
  • 收稿日期:1983-05-12 出版日期:1986-09-30 发布日期:1986-09-30

EFFECT OF PHONON DISPERSION ON EXCITON

GU SHIWEI   

  1. Neimenggu University
  • Received:1983-05-12 Online:1986-09-30 Published:1986-09-30

PDF

65

被引次数

2

摘要： 本文计及纵光学声子的色散,用微扰法导出了激子的有效哈密顿,发现激子的有效质量、自陷能、电子-空穴有效作用势都与声子的色散有关.随着色散的加强,激子的有效质心质量、有效约化质量增大,电子-空穴有效作用势的屏蔽半径变短.

Abstract: In this paper, the dispersion of the longitudinal optical phonon is considered in a parabolic approximation. The effective Hamiltonian is derived by the use of a perturbation method. It is found that the more the phonon dispersion, the larger is the effective mass, and the smaller the screening radius of electron-hole effective interacting potential.