中国物理B ›› 2003, Vol. 12 ›› Issue (8): 899-904.doi: 10.1088/1009-1963/12/8/315

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

Dynamical properties of two-band superlattices with strong interband coupling in real space under the action of ac and dc－ac fields

段素青, 王志刚, 赵宪庚   

  1. Institute of Applied Physics and Computational Mathematics, P O Box 8009(26), Beijing 100088, China
  • 收稿日期:2002-12-20 修回日期:2003-03-10 出版日期:2005-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10274007), and a grant of the China Academy of Engineering and Physics.

Dynamical properties of two-band superlattices with strong interband coupling in real space under the action of ac and dc－ac fields

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

  1. Institute of Applied Physics and Computational Mathematics, P O Box 8009(26), Beijing 100088, China
  • Received:2002-12-20 Revised:2003-03-10 Online:2005-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10274007), and a grant of the China Academy of Engineering and Physics.

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摘要： Within a two-band tight-binding model driven by ac and dc－ac electric fields, using numerical methods, we investigate the dynamics of electrons and the quasi-energy spectrum of the system with strong interband coupling in real space. We find that when the bandwidth is suppressed to a value much smaller than the field frequency, the dynamical localization can exist in the system. The corresponding regions are found for the occurrence of dynamical localization in the parameter space.

Abstract: Within a two-band tight-binding model driven by ac and dc－ac electric fields, using numerical methods, we investigate the dynamics of electrons and the quasi-energy spectrum of the system with strong interband coupling in real space. We find that when the bandwidth is suppressed to a value much smaller than the field frequency, the dynamical localization can exist in the system. The corresponding regions are found for the occurrence of dynamical localization in the parameter space.

Key words: dynamical localization, quasi-energy spectrum, strong coupling

中图分类号:  (Superlattices)

  • 73.21.Cd
73.40.-c (Electronic transport in interface structures)