| 扰动对一维局域模的影响 |
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| 引用本文： | 张大成,王鹿霞,刘德胜,韩圣浩,解士杰.扰动对一维局域模的影响[J].物理学报,2003,52(12):3191-3196. |
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| 作者姓名： | 张大成 王鹿霞 刘德胜 韩圣浩 解士杰 |
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| 作者单位： | 山东大学物理与微电子学院,晶体材料国家重点实验室,济南 250100 |
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| 基金项目： | 国家自然科学基金（批准号：90103034, 10074040, 60176021）资助的课题. |
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| 摘 要： | 在紧束缚模型基础上，考虑到缺陷、温度、掺杂等外界因素的影响，用方形随机分布模拟了格点原子扰动对一维局域模的影响.给出了不同扰动参数σ下，孤子和极化子中各个局域模的变化情况.计算发现，由于孤子g1模的钉扎效应，扰动后，弱模g4定域性会得到加强，还会产生两个新定域模g′1和g′2，它们与相应的g1和g2模有相同的节点和宇称 ；极化子的g7模在畸变较大时将
关键词：
扰动
局域模
聚合物
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| 关 键 词： | 扰动 局域模 聚合物 |
| 收稿时间： | 2002-12-10 |
| 修稿时间： | 2002年12月10 |
Effect of atomic fluctuation on the localized modes in one-dimensional system |
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| Zhang Da-Cheng,Wang Lu-Xi,Liu De-Sheng,Han Sheng-Hao and Xie Shi-Jie.Effect of atomic fluctuation on the localized modes in one-dimensional system[J].Acta Physica Sinica,2003,52(12):3191-3196. |
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| Authors: | Zhang Da-Cheng Wang Lu-Xi Liu De-Sheng Han Sheng-Hao and Xie Shi-Jie |
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| Abstract: | In the frame work of the tight-binding approximation, the effect of defects and disorder on the vibrational modes in one-dimensional systems was studied through a random distribution model. It was found that the Goldstone mode of a so liton or polaron is pinned and its frequency is shifted up to a finite value. Th e weak mode g4 of a soliton is enhanced. The staggered modes keep the ir localization even if there is a large lattice fluctuation. Some new modes appear when the perfect soliton or polaron configuration is disturbed. |
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| Keywords: | atomic fluctuation localized mode polymer |
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