標題: Effect of electron-phonon interaction on the impurity binding energy in a quantum wire
作者: Chuu, DS
Chen, YN
Lin, YK
電子物理學系
Department of Electrophysics
關鍵字: polaron;quantum wire;perturbative-variational technique
公開日期: 1-九月-2000
摘要: The effect of electron-optical phonon interaction on the hydrogenic impurity binding energy in a cylindrical quantum wire is studied. By using Landau and Pekar variational method, the Hamiltonian is separated into two parts which contain phonon variable and electron variable, respectively. A perturbative-variational technique is then employed to construct the trial wave function for the electron part. The effect of confined electron-optical phonon interaction on the binding energies of the ground state and an excited state are calculated as a function of wire radius. Both the electron-bulk optical phonon and electron-surface optical phonon coupling are considered. It is found that the energy corrections of the polaron effects on the impurity binding energies increase rapidly as the wire radius is shrunk, and the bulk-type optical phonon plays the dominant role for the polaron effects. (C) 2000 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0921-4526(00)00451-8
http://hdl.handle.net/11536/30281
ISSN: 0921-4526
DOI: 10.1016/S0921-4526(00)00451-8
期刊: PHYSICA B
Volume: 291
Issue: 3-4
起始頁: 228
結束頁: 235
顯示於類別:期刊論文


文件中的檔案:

  1. 000088686300003.pdf