| 二维链间扩展的极化子动力学研究 |
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| 引用本文： | 刘文,刘德胜,李海宏.二维链间扩展的极化子动力学研究[J].物理学报,2010,59(9):6405-6411. |
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| 作者姓名： | 刘文 刘德胜 李海宏 |
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| 作者单位： | (1)济宁学院物理与信息工程系,曲阜 273155; (2)济宁学院物理与信息工程系,曲阜 273155;山东大学物理学院,济南 250100 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(批准号: 2009CB929204)资助的课题. |
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| 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.
关键词：
链间扩展极化子
链间耦合
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| 关 键 词： | 链间扩展极化子 链间耦合 |
| 收稿时间： | 2009-09-25 |
Dynamics of two-dimensional interchain delocalized polarons |
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| Liu Wen,Liu De-Sheng,Li Hai-Hong.Dynamics of two-dimensional interchain delocalized polarons[J].Acta Physica Sinica,2010,59(9):6405-6411. |
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| Authors: | Liu Wen Liu De-Sheng Li Hai-Hong |
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| Institution: | Department of Physics and Information Engineering,Jining University,Qufu 273155, China;Department of Physics and Information Engineering,Jining University,Qufu 273155, China;School of Physics,Shandong University,Jinan 250100, China;Department of Physics and Information Engineering,Jining University,Qufu 273155, China |
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| Abstract: | 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. |
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| Keywords: | interchain delocalized polaron interchain coupling |
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