聚乙炔极化子的新电子束缚态

本文用自洽迭代的方法研究了SSH模型中极化子的电子能谱。结果发现,除了禁带中两个在TLM模型中存在的深能级电子束缚态外,还存在四个浅能级的电子束缚态。它们形成分立的能级,并分别位于导带的顶部和底部以及价带的顶部和底部。价带顶和导带底的两个束缚态只在一定的耦合参量λ范围内出现。 关键词：

NEW LOCALIZED ELECTRONIC STATE OF POLARON IN POLYACETYLENE

We have studied the energy spectra of polaron in SSH model by using a selfconsistent ap-proach. Four new localized electronic state are discovered. They form four discrete levels outside the conduction and valence bands: one locates near the battom of the conduction band and one near the top of conduction bunt, another two are symmetrically near the valence band. Those at the bottom of conduction band and top of valence band only exist in the limited range of coupling constant λ.