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Intrinsic Localization of Bloch Electrons in dc-ac Electric Fields |
LIU Wu-ming1;ZHAO Xian-geng2;LIU Ke3 |
1Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
2Institute of Applied Physics and Computational Mathematics, Beijing 100088
3Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080
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Cite this article: |
LIU Wu-ming, ZHAO Xian-geng, LIU Ke 1997 Chin. Phys. Lett. 14 924-927 |
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Abstract Exact soliton solutions describing nonlinear dynamical behavior of Bloch electrons under action of dc-ac electric fields are obtained, from which it is found that the evolution behavior of Bloch electrons is always oscillatory in time, with oscillatory frequencies depending on electric fields. A number of phenomena associated with the translational symmetry of the system, the staggered localized states, as well as the relationship between intrinsic localized states and solitons are addressed. The corresponding energy, momentum, and norm are also studied.
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Keywords:
71.50.+t
73.20.Dx
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Published: 01 December 1997
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