The two-component random resistor network, i.e., the network composed of conducting and insulating bonds, both with finite values of conductance (${\mathit{g}}_{\mathit{i}}$ and ${\mathit{g}}_{\mathit{c}}$), is analyzed. Based on the general scaling assumption, a single crossover exponent for small value of h=${\mathit{g}}_{\mathit{i}}$/${\mathit{g}}_{\mathit{c}}$ for all multifractal moments of current or voltage distributions is found not only in d=2 dimensions. This allows us to describe the behavior of 1/f noise of the two-component random resistor network over the entire region of concentration p of the conducting component: Three pictures of the relative noise intensity S versus the concentration p are admissible, depending on the ratio of the microscopic-1/f-noise intensities of the components.

• Received 1 April 1991

DOI:https://doi.org/10.1103/PhysRevB.45.205