Non-conventional Superconductors and Percolation
  This paper presents a novel theory for understanding the mechanics behind non-conventional superconductors. It presents the hypothesis that non-conventional superconductors are 2D lattices of super-cells and that the superconductivity mechanism involves the ordered hopping of itinerant electrons along with phase transitions in the edge percolations. 
Xuan Zhong Ni and M. H. Jiang
cond-mat.supr-con