| 次近邻电子跳跃对孤子的电子束缚态和孤子附近局域模的影响 |
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| 引用本文： | 安忠,李占杰,姚凯伦. 次近邻电子跳跃对孤子的电子束缚态和孤子附近局域模的影响[J]. 物理学报, 1993, 42(9): 1532-1536 |
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| 作者姓名： | 安忠 李占杰 姚凯伦 |
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| 作者单位： | 华中理工大学物理系,武汉430074 |
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| 摘 要： | 从SSH模型出发,考虑电子次近邻跳跃的影响,研究了聚乙炔中孤子的电子束缚态和孤子附近的局域振动模。结果发现:1.电子能谱中的电子-空穴对称性消失;2.孤子的电子束缚态的数目和位置发生了变化,且与孤子的类型有关;3.孤子附近出现了一个新的局域振动模G6;4.次近邻电子跳跃改变了局域模的频率,增强了局域模的局域性。关键词：
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| 关 键 词： | 聚乙炔 孤立子 束缚态 局域模 |
| 收稿时间： | 1992-11-30 |
EFFECTS OF NEXT-NEIGHBOR HOPPING INTERACTIONS ON THE ELECTRONIC BOUND STATES AND LOCALIZED MODES AROUND A SOLITON IN TRANS-(CH)x |
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| AN ZHONG,LI ZHAN-JIE and YAO KAI-LUN. EFFECTS OF NEXT-NEIGHBOR HOPPING INTERACTIONS ON THE ELECTRONIC BOUND STATES AND LOCALIZED MODES AROUND A SOLITON IN TRANS-(CH)x[J]. Acta Physica Sinica, 1993, 42(9): 1532-1536 |
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| Authors: | AN ZHONG LI ZHAN-JIE YAO KAI-LUN |
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| Abstract: | We have studied electronic bound states and the localized modes around the soliton after turning on the next-neighbor hopping interaction, based on SSH model. The results show that (1) the electronhole symmetry of the energy band structure implied by SSH model is broken ; (2) the number and location of the bound states trapped by the soliton have changed; (3) a new localized mode have been found; (4)the frequencies of modes have shifted and their localization are strengthened. |
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