金属小颗粒超导电性研究

发布时间：2018-05-20 02:30

  本文选题：两带Richardson模型 + 随机矩阵理论　； 参考：《低温物理学报》2017年02期

【摘要】：采用两带Richardson模型,用随机矩阵理论方法研究了具有高斯能级分布的金属小颗粒的超导电性.结果表明,带间相互作用有利于金属小颗粒的超导电性.对于每一个自旋S基态,都存在着对应的超导临界尺寸lc,当金属小颗粒的线度小于lc时,超导电性消失;S越大,lc越大;对于S≠0的自旋基态,只有超导衰减现象,对于S=0的自旋基态,随着颗粒尺寸的减小,先出现超导增强现象,随后出现超导衰减现象,理论结果与实验符合.
[Abstract]:The superconductivity of small metal particles with Gao Si energy level distribution is studied by using the two-band Richardson model and the stochastic matrix theory. The results show that the interband interaction is beneficial to the superconductivity of small metal particles. For each spin S ground state, there is a corresponding superconducting critical size (LC). When the linearity of a small metal particle is less than lc, the superconductivity disappears and the superconductivity disappears, and for the spin ground state with S 鈮，

本文编号：1912812