| 李新霞.一维派尔斯晶格体系中反常热导的研究[J].南华大学学报(自然科学版),2009,23(4):53~55.[LI Xin-xia.Special Heat Conduction in One-dimensional Peierls Systems[J].Journal of University of South China(Science and Technology),2009,23(4):53~55.] |
| 一维派尔斯晶格体系中反常热导的研究 |
| Special Heat Conduction in One-dimensional Peierls Systems |
| 投稿时间：2009-05-05 |
| DOI： |
| 中文关键词: 派尔斯晶格 热传导 能量输运 |
| 英文关键词:Peierls lattice heat conduction energy transport |
| 基金项目:湖南省教育厅科研基金资助项目（08C763） |
|
| 摘要点击次数: 600 |
| 全文下载次数: 858 |
| 中文摘要: |
| 考虑到许多真实材料的派尔斯不稳定性，提出了一维二聚化晶格模型.通过改变体系长短键键能的差异，得到了在 之间连续变化的指数值α.对于真实体系如聚乙炔链，计算结果与Mode-coupling theory理论的预测值吻合较好，表明同质的(homogenous)链是最好的热导体. |
| 英文摘要: |
| We put forward a dimerized lattice model with the consideration of the Peierls instability that occurs in many realistic materials and investigate its behaviors of heat conduction.A continuous variation of the divergent exponent of in the interval of (0.7～0.4) is shown by taking into account the difference between the long bond and the short one in the systems.For typical parameters related to real physical systems such as the polyethylene chain,the result is in good agreement with that predicted by the mode-coupling theory.Moreover,the homogenous chain is shown to be the best thermal conductor. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |