We present the results of a 2D and 3D electrical conductivity simulation of a metal-insulator composite in the range of cluster plasmon frequencies. For the 3D simulations we use an extension of the matrix transfer method that was first introduced to calculate the percolation critical exponents...

The loss angle δ is used to characterize the dielectric properties of inhomogeneous materials, in the framework of percolation theory. We have shown that δ takes the universal value δ = πs/2(s + t) at the percolation threshold (p = pc), and low frequency (ε → 0), where s and t are the...

We report experimental results on the flicker noise in a fractal lattice. The exponent b value is found equal to 1. We give preliminary results on the behaviour of a square lattice made up of resistors whose values are distributed with a R−α probability.