孤子振动模的定域性

对于聚乙炔中孤子的五个定域振动模,本文研究了它们的位形随链长的变化而演变的情况,从而可确定其定域性。本文同时考察了开链和闭环两种情况。对于闭链,五个定域模定域于孤子附近,其形状与链长无关。对于开链,定域模g₁,g₂,g₃和g₅的位形不随链长而改变,因而是完全定域的,但是g₄的两翼随链长增加而变宽,定域性不完全。 关键词：

THE LOCALIZATION OF THE VIBRATIONAL MODES AROUND THE SOLITON

In order to figure out the localizations of the five localized modes around the soliton in polyacetylene, the dependences of their configurations on the length of the chain have been studied in both the open chain and the close ring cases. For the open chain, it is found that the localized mode g₄ has some different behavior from the localized modes g₁, g₂, g₃ and g₅, namely, when the length of chain is increasing, the configurations of g₁, g₂, g₃ and g₅ do not change, whereas the wings of g₄ become broader, this means that the localization of g₄ is not so complete as the other localized modes.