中国物理B ›› 2005, Vol. 14 ›› Issue (6): 1232-1237.doi: 10.1088/1009-1963/14/6/030

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Effect of electron-phonon interactions on dynamical localization of semiconductor superlattices

王志刚, 段素青, 赵宪庚   

  1. Institute of Applied Physics and Computational Mathematics, P.O.Box 8009, Beijing P. R. China, 100088
  • 收稿日期:2004-08-02 修回日期:2004-12-16 出版日期:2005-05-27 发布日期:2005-05-27

Effect of electron-phonon interactions on dynamical localization of semiconductor superlattices

Wang Zhi-Gang (王志刚), Duan Su-Qing (段素青), Zhao Xian-Geng (赵宪庚)   

  1. Institute of Applied Physics and Computational Mathematics, P.O.Box 8009, Beijing P. R. China, 100088
  • Received:2004-08-02 Revised:2004-12-16 Online:2005-05-27 Published:2005-05-27

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摘要： Effect of the electron-phonon interactions on the property of dynamical localization of semiconductor superlattices in a single-band model under the actions of the electric dc and acfield, respectively, are investigated. The results show that the electron-phonon interactions can destroy the dynamical localization of the electron. For the same phonon frequency, when the strength of the electron-phonon interactions becomes larger, the electron is more quickly scattered. When the phonon frequency equals to the Bloch frequency ΩB in dc field or Ωin ac field or one of them in dc-ac field, the electron initially localized at the 0th site can be rapidly scattered to the other sites, where Ω is the frequency of the ac field. The property of the dynamical localization of the electron is seriously destroyed by the photon-phonon resonant field.

Abstract: Effect of the electron-phonon interactions on the property of dynamical localization of semiconductor superlattices in a single-band model under the actions of the electric dc and acfield, respectively, are investigated. The results show that the electron-phonon interactions can destroy the dynamical localization of the electron. For the same phonon frequency, when the strength of the electron-phonon interactions becomes larger, the electron is more quickly scattered. When the phonon frequency equals to the Bloch frequency ΩB in dc field or Ωin ac field or one of them in dc-ac field, the electron initially localized at the 0th site can be rapidly scattered to the other sites, where Ω is the frequency of the ac field. The property of the dynamical localization of the electron is seriously destroyed by the photon-phonon resonant field.

Key words: electron-phonon interactions, dynamical localization

中图分类号:  (Phonons or vibrational states in low-dimensional structures and nanoscale materials)

  • 63.22.-m
63.20.K- (Phonon interactions)