Percolation Thresholds and Phase Transitions in Binary Composites

Resumo

The metal–insulator and metal–superconductor phase transitions related to the percolation thresholds in two-component composites are considered. The behavior of effective conductivity σ_e in the vicinity of both thresholds is described in terms of the similarity hypothesis. A one-to-one correspondence between the equations derived for σ_e in both critical regions is found for randomly heterogeneous systems.