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In this paper we characterize the superconductor-insulator phase transition on a network of 2d percolation clusters. Sufficiently close to the percolation threshold, for p p c , this network has a broad degree distribution, and at p = p c the degree distribution becomes scale free. We study the transverse Ising model on this complex topology in order to characterize the superconductor-insulator transition in a network formed by 2d percolation clusters of a superconductor material. We show, by a mean-field treatment, that the critical temperature of superconductivity depends on the maximal eigenvalue Λ of the adjacency matrix of the network. At the percolation threshold, p = p c , we find that the maximal eigenvalue Λ of the adjacency matrix of the network of 2d percolation clusters has a maximum. In correspondence of this maximum the superconducting critical temperature T c is enhanced. These results suggest the design of new superconducting granular materials with enhanced critical temperature.
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