%0 Journal Article
%T THE 2D LOCALIZED MODES OF BIPOLARON IN cis-POLYACETYLENE<br>
%A LI ZHAN-JIE
%A AN ZHONG
%A YAO KAI-LUN
%A <br>
%J 中国物理 B
%D 1994
%I 
%X 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.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=DCFD730EFEFE9908E85E073ADFC4314F&yid=3EBE383EEA0A6494&vid=38B194292C032A66&iid=708DD6B15D2464E8&sid=BC60A9A1D91963F5&eid=043C7D0F3F6AC1B3&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0