Dynamical properties of two-band superlattices with strong interband coupling in real spac

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

【期刊名称】《中国物理：英文版》 【年(卷),期】2003(012)008

【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. 【总页数】6页(899-904)

【关键词】dynamical localization;quasi-energy spectrum;strong coupling

【作者】段素青;王志刚;赵宪庚

【作者单位】Institute of Applied Physics and Computational Mathematics, P O Box 800926, Beijing 100088, China;Institute of Applied Physics and Computational Mathematics, P O Box 800926, Beijing 100088, China;Institute of Applied Physics and Computational

Mathematics, P O Box 800926, Beijing 100088, China 【正文语种】中文 【中图分类】 【相关文献】

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