THE 2D LOCALIZED MODES OF BIPOLARON IN cis-POLYACETYLENE
LI ZHAN-JIE (李占杰)a, AN ZHONG (安忠)a, YAO KAI-LUN (姚凯伦)b
a Department of Physics, State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; b Department of Physics,Huazhong University of Science and Technology, Wuhan 430074, China
Abstract The localized vibrational modes around a bipolaron in cis-(CH)x are studied by using a two-dimensional extension of the SSH model that includes the bond-bending term. A number of additional modes have been found, compared with the results based on the standard SSH model The amplitudes of the two directions (x and y direction) are comparable for most of the modes as in the trans-(CH)x case. The number of localized modes and their frequencies depend not only on the coupling constant, but also on the bond-bending term and the parameter t1 in removing the degeneracy of the ground state.
Received: 25 January 1994
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
LI ZHAN-JIE (李占杰), AN ZHONG (安忠), YAO KAI-LUN (姚凯伦) THE 2D LOCALIZED MODES OF BIPOLARON IN cis-POLYACETYLENE 1994 Acta Physica Sinica (Overseas Edition) 3 836
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