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
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;
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.
Received: 20 April 1999
Revised: 19 June 1999
Accepted manuscript online:
An Zhong (安忠), Li Zhan-jie (李占杰), Liu Ying (刘英), Li You-cheng (李有成) TWO-DIMENSIONAL LOCALIZED MODES IN CONJUGATED POLYMERS: THE NONLINEAR ELECTRON-PHONON COUPLING EFFECT 2000 Chinese Physics 9 37
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