中国物理B ›› 2000, Vol. 9 ›› Issue (1): 37-41.doi: 10.1088/1009-1963/9/1/008

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TWO-DIMENSIONAL LOCALIZED MODES IN CONJUGATED POLYMERS: THE NONLINEAR ELECTRON-PHONON COUPLING EFFECT

刘英1, 李有成1, 李占杰2, 安忠3   

  1. (1)Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China; (2)Department of Physics, Huazhong University of Science and Technology, Wuhan 430073, China; (3)Department of Physics, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
  • 收稿日期:1999-04-20 修回日期:1999-06-19 出版日期:2000-01-15 发布日期:2005-06-10

TWO-DIMENSIONAL LOCALIZED MODES IN CONJUGATED POLYMERS: THE NONLINEAR ELECTRON-PHONON COUPLING EFFECT

An Zhong (安忠)a, Li Zhan-jie (李占杰)b, Liu Ying (刘英)c, Li You-cheng (李有成)c   

  1. a Department of Physics, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China b Department of Physics, Huazhong University of Science and Technology, Wuhan 430073, China;  c Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China; 
  • Received:1999-04-20 Revised:1999-06-19 Online:2000-01-15 Published:2005-06-10

摘要: The two-dimensional localized modes around a soliton have been investigated by using an extension of Su-Shrieffer-Heeger model, in which is included the nonlinear term of electron-phonon interaction. The results show that there appears an additional localized mode, and the two modes obtained in the previous work without the nonlinear term disappear. Furthermore, the frequencies of the modes are shifted and their localizations are changed after turning on the nonlinear term.

Abstract: The two-dimensional localized modes around a soliton have been investigated by using an extension of Su-Shrieffer-Heeger model, in which is included the nonlinear term of electron-phonon interaction. The results show that there appears an additional localized mode, and the two modes obtained in the previous work without the nonlinear term disappear. Furthermore, the frequencies of the modes are shifted and their localizations are changed after turning on the nonlinear term.

中图分类号:  (Solitons)

  • 05.45.Yv
63.20.K- (Phonon interactions) 63.20.Pw (Localized modes)