| 准周期对spin-Peierls模型中晶格畸变和能隙的影响 |
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| 引用本文： | 李煜芝,陈宇光,石云龙.准周期对spin-Peierls模型中晶格畸变和能隙的影响[J].物理学报,2006,55(5):2539-2542. |
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| 作者姓名： | 李煜芝 陈宇光 石云龙 |
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| 作者单位： | (1)同济大学波耳固体物理研究所，上海 200092; (2)雁北师范学院固体物理研究所，大同 037009 |
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| 基金项目： | 中国科学院资助项目;上海市青年科技启明星计划;山西省留学回国人员科研项目 |
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| 摘 要： | 采用严格对角化方法和自洽方法，研究准周期相互作用对spin-Peierls模型中晶格畸变和能隙的影响.研究表明，引入准周期作用后，spin-Peierls模型中晶格畸变和能谱表现出准周期结构的自相似特性.另外，在弹性系数K取不同值时，随着准周期作用强度的增强，晶格畸变的平均值可能会增大、减小或先增大后减小，其对应的能隙也有相似的行为.
关键词：
准周期相互作用
spin-Peierls模型
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| 关 键 词： | 准周期相互作用 spin-Peierls模型 |
| 文章编号： | 1000-3290/2006/55（05）2539-04 |
| 收稿时间： | 10 21 2005 12:00AM |
| 修稿时间： | 2005-10-212005-11-10 |
The effect of quasiperiodicity on lattice distortion and energy gap in spin-Peierls model |
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| Li Yu-Zhi,Chen Yu-Guang,Shi Yun-Long.The effect of quasiperiodicity on lattice distortion and energy gap in spin-Peierls model[J].Acta Physica Sinica,2006,55(5):2539-2542. |
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| Authors: | Li Yu-Zhi Chen Yu-Guang Shi Yun-Long |
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| Institution: | 1Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China;2 Institute of Solid State Physics, Yanbei Normal School, Datong 037009, China |
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| Abstract: | The effect of quasiperiodic interaction on lattice distortion and energy gap in spin-Peierls model is studied by exact diagonalization and self-consistent methods. It is shown that quasiperiodic interaction can result in self-similar characteristics for lattice distortion and energy spectra of spin-Peierls model. Moreover, we find that the average value of lattice distortion will be increased, decreased or increased firstly then decreased as quasiperiodic interaction strength is enhanced. Such kind of behavior strongly depends on the lattice spring constant K. The energy gap also displays similar behavior. |
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| Keywords: | quasiperiodic interaction spin-Peierls model |
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