| 金属超导小粒子的比热与随机矩阵理论 |
| |
| 引用本文： | 陈志谦,李春梅,李习林.金属超导小粒子的比热与随机矩阵理论[J].西南师范大学学报(自然科学版),2006,31(5):62-65. |
| |
| 作者姓名： | 陈志谦 李春梅 李习林 |
| |
| 作者单位： | 西南大学,材料科学与工程学院,重庆,400715 |
| |
| 基金项目： | 国家自然科学基金资助项目(10147207) . |
| |
| 摘 要： | 用静态路径积分和鞍点近似分析了金属超导小粒子的统计涨落、能级统计效应以及转变温度附近的奇偶效应,得到其比热随温度变化的关系.
|
| 关 键 词： | 比热 小粒子 随机矩阵 |
| 文章编号： | 1000-5471（2006）05-0062-04 |
| 收稿时间： | 2005-10-11 |
| 修稿时间： | 2005年10月11 |
Specific Heat of Small Metallic Superconducting Grains and the Random Matrices Theory |
| |
| CHEN Zhi-qian,LI Chun-mei,Li Xi-lin.Specific Heat of Small Metallic Superconducting Grains and the Random Matrices Theory[J].Journal of Southwest China Normal University(Natural Science),2006,31(5):62-65. |
| |
| Authors: | CHEN Zhi-qian LI Chun-mei Li Xi-lin |
| |
| Institution: | School of Materials Science and Engineering, Southwest University, Chongqing 400715, China |
| |
| Abstract: | The effects of the gap fluctuations in small superconductors, as well as the level statistic effects and the odd-even effects in the neighborhood of T_C are investigated by means of the static path approximation to the partition function, and the BCS approximation, derived as the saddle point approximation to the SPA. The transitions of the BCS approximation become increasingly washed out as the size decreases. Moreover, non-vanishing pairing correlations are seen to subsist in small systems where no ordinary superconducting solution exists at the BCS level. |
| |
| Keywords: | specific heat metallic grains random matrices |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《西南师范大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《西南师范大学学报(自然科学版)》下载免费的PDF全文 |
