Universal gap fluctuations in the superconductor proximity effect.
نویسندگان
چکیده
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.
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عنوان ژورنال:
- Physical review letters
دوره 86 5 شماره
صفحات -
تاریخ انتشار 2001