%0 Journal Article
%T BOUNDARY EFFECTS ON THE STABILITY OF THE SOLITON PAIRS IN A DOPED POLYACETYLENE CHAIN<br>掺杂聚乙炔中的边界效应与孤子对稳定性
%A SUN GUO-CHANG
%A XIE SHI-JIE
%A MEI LIANG-MO
%A <br>孙国昌
%A 解士杰
%A 梅良模
%J 物理学报
%D 1993
%I 
%X The stability of soliton pairs and the electronic energy level structures in a doped poly-acetylene chain have been studied under natural boundary conditiono. In the Itamiltanian usel an end point potential was added to the SHH model, and the screened Coulomb potential of impurities and e-e interaetion on the tattice points were also indndelincluded. The caleulated results Show that, as the range of coulomb interaction is long enongh, stable soliton pairs are formel in the chain, and the stability is enlanced by the influce of the ends the gap width becomes narrow with the increase of chain length. But the deplndence of transition energg from soliton level to band bottom on chain length is not very signicant.
%K 聚乙炔
%K 孤立子
%K 稳定性
%K 能级
%K 掺杂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=A320F153FC54915E78CB28B47FBA21EE&yid=D418FDC97F7C2EBA&vid=ECE8E54D6034F642&iid=5D311CA918CA9A03&sid=C02C1722E0B3854F&eid=525C740F5A062BF4&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=4