Universal gap fluctuations in the superconductor proximity effect.
Universal gap fluctuations in the superconductor proximity effect.
复制标题
超导体邻近效应中的普遍间隙波动。
DOI：
10.1103/physrevlett.86.874
复制
发表时间：
2000
影响因子：
8.6
通讯作者：
C. Beenakker
中科院分区：
文献类型：
--
作者：
M. Vavilov;P. Brouwer;V. Ambegaokar;C. Beenakker
本文利用随机矩阵理论研究了金属颗粒或量子点在接近超导体时激发间隙的介观波动。我们提出间隙的概率分布在重新标度的单位中是一个通用函数。我们对间隙分布的分析预测很好地符合模型哈密顿量的精确对角化。
Random-matrix theory is used to study the mesoscopic fluctuations of the excitation gap in a metal grain or quantum dot induced by the proximity to a superconductor. We propose that the probability distribution of the gap is a universal function in rescaled units. Our analytical prediction for the gap distribution agrees well with exact diagonalization of a model Hamiltonian.