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

• 来源期刊: 中国物理（英文版）
• 关键词: dynamical localization quasi-energy spectrum strong coupling
• 年，卷（期）: 2003,（8）
• 页码范围: 899-904
• 页数: 6页
• 语种: 英文

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 wlue 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.