| 链间耦合对聚乙炔中量子晶格涨落和空间结构稳定性的影响 |
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| 引用本文： | 曾上游 吴长勤. 链间耦合对聚乙炔中量子晶格涨落和空间结构稳定性的影响[J]. 复旦学报(自然科学版), 1998, 37(6): 737-742 |
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| 作者姓名： | 曾上游 吴长勤 |
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| 作者单位： | 复旦大学物理学系物理学系!上海,200433 |
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| 基金项目： | 上海市科委科技启明星计划资助 |
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| 摘 要： | 在Ｓｕ－Ｓｃｈｒｉｅｆｆｅｒ－Ｈｅｅｇｅｒ（ＳＳＨ）哈密顿量的基础上,加上链间电荷转移项,考虑链间耦合对聚乙炔中量子晶格涨落和空间结构稳定性的影响。考虑了链间耦合作用后,不同的链间结构具有不同的能量。对于能量低的结构,链间耦合将导致孤子禁闭,从而抑制量子晶格涨落。对于能量高的结构,链间耦合将导致孤子扩散,从而加大量子晶格涨落。
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| 关 键 词： | 链间耦合 量子晶格涨落 聚乙炔 空间结构 稳定性 |
Effect of Interchain Coupling on Quantum Lattice Fluctuation and Space Structure Stability in Polyacetylene |
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| Zeng Shangyou, Wu Changqin. Effect of Interchain Coupling on Quantum Lattice Fluctuation and Space Structure Stability in Polyacetylene[J]. Journal of Fudan University(Natural Science), 1998, 37(6): 737-742 |
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| Authors: | Zeng Shangyou Wu Changqin |
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| Affiliation: | Department of Physics |
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| Abstract: | The effects of interchain coupling on the quantum lattice fluctuation and space structure stability in polyacetylene are considered within the Su-Schriffer-Heeger model Hamiltonian plus the interchain coupling. When interchain coupling is taken into account, different space structrues have different energies. For the low energy structure, the interchain coupling induces soliton-antisoliton(SS) confinement, and suppresses the quantum lattice fluctuation. For the hige energy structure, the interchain coupling induces solitonantisoliton(SS) expansion, and enhances the quantum lattice fluctuation. |
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| Keywords: | interchain coupling quantum lattice fluctuation |
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