| 纳米量级超导粒子电子比热中的量子尺寸效应 |
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| 引用本文： | 姚勇,李凤,施振刚,陈志谦. 纳米量级超导粒子电子比热中的量子尺寸效应[J]. 西南师范大学学报(自然科学版), 2004, 29(5): 825-830 |
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| 作者姓名： | 姚勇 李凤 施振刚 陈志谦 |
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| 作者单位： | 1. 西南师范大学,物理学院,重庆,400715
2. 西南师范大学,材料科学与工程学院,重庆,400715 |
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| 基金项目： | 国家自然科学基金资助项目(10147207)，西南师范大学自然科学基金资助项目. |
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| 摘 要： | 考虑了奇/偶电子数分布,从配分函数出发,用静态路径近似(SPA)方法和BCS方法计算了随机矩阵理论中高斯正交系综(GOE)所对应的电子能级分布对超导纳米粒子的电子比热的影响,得到了弱自旋-轨道耦合和弱磁场中和奇/偶电子数分布下的电子比热,并做了简单分析.经过计算和分析,发现粒子尺寸和奇/偶电子数对电子比热和转变温度有影响.
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| 关 键 词： | 超导纳米粒子 配分函数 静态路径近似 随机矩阵理论 电子比热 |
| 文章编号： | 1000-5471(2004)05-0825-06 |
| 修稿时间： | 2003-12-08 |
The Quantum-Size Effect in the Specific Heat of Superconducting Nano-particles |
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| YAOYong,LIFeng,SHI Zhen-gang,CHEN Zhi-qian . School of Physics,Southwest China Normal University,Chongqing ,China, . School of Material Science and Engineering,Southwest China Normal University,Chongqing ,China. The Quantum-Size Effect in the Specific Heat of Superconducting Nano-particles[J]. Journal of southwest china normal university(natural science edition), 2004, 29(5): 825-830 |
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| Authors: | YAOYong LIFeng SHI Zhen-gang CHEN Zhi-qian . School of Physics Southwest China Normal University Chongqing China . School of Material Science Engineering Southwest China Normal University Chongqing China |
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| Affiliation: | YAOYong~1,LIFeng~1,SHI Zhen-gang~1,CHEN Zhi-qian~2 1. School of Physics,Southwest China Normal University,Chongqing 400715,China, 2. School of Material Science and Engineering,Southwest China Normal University,Chongqing 400715,China |
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| Abstract: | The thermodynamic properties of an ensemble of superconducting nano-particles are affected by the fluctuations of the order parameter, causing the important deviations from the results of mean-field theory, especially in the critical regime. We use the static paths approximation(SPA) and BCS methods calculating numerically the specific heat of superconducting nano-particles in the grand canonical ensemble with an even or odd number of electrons by considering the effects of the level distribution and level correlation. |
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| Keywords: | superconducting nano-particles partition function static paths approximation random matrix theory specific heat |
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