Dependence of global superconductivity on inter-island coupling in arrays of long SNS junctions
Dependence of global superconductivity on inter-island coupling in arrays of long SNS junctions
We present measurements of the superconducting transition temperature, Tc, for arrays of mesoscopic Nb islands patterned on Au films, for large island spacings d. We show that Tc ∼ 1/d2, and explain this dependence in terms of the quasiclassical prediction that the Thouless energy, rather than the superconducting gap, governs …