二维链间扩展的极化子动力学研究  

Dynamics of two-dimensional interchain delocalized polarons

作　　者：刘文[1] 刘德胜[1,2] 李海宏[1] 

机构地区：[1]济宁学院物理与信息工程系,曲阜273155 [2]山东大学物理学院,济南250100

出　　处：《物理学报》2010年第9期6405-6411,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(973计划)(批准号:2009CB929204)资助的课题~~

摘　　要：基于扩展的SSH模型,研究了有序耦合聚合物链系统中的极化子动力学,包括极化子的形成过程及其在外场下的输运.发现,当聚合物链间的耦合较强时,注入到系统中的电子会诱发二维链间扩展的极化子态,分布在多条聚合物链上.另外,动力学模拟表明,与一维链内定域极化子相比,在相同的电场强度下二维极化子具有更大的运动速度,这与实验结果一致.Based on the SSH model,polaron dynamics in a system of highly ordered conjugated polymer chains is investigated, including polaron formation and transport in the presence of an external electric field. It is found that,beyond a certain strength of the interchain coupling, the injected electron will induce a two-dimensional delocalized polaron state, expanding over several chains. Dynamical simulations suggest that,under the same electric field,two-dimensional interchain delocalized polarons move faster than intrachain localized polarons,as suggested by earlier experiments.

关 键 词：链间扩展极化子 链间耦合 

分 类 号：O482.4[理学—固体物理]