MAGNETORESISTANCE OF PERCOLATING GOLD-FILMS

We present a new approach to calculating the magnetoresistance due to weak electron localization in 2d for percolating thin films, directly taking into account their fractal properties through the concept of an omalous electron diffusion. Our approach yields excellent agreement wi th experimental data for thin inhomogeneous gold films. From the analy sis we obtain the anomalous temperature dependence of the phase cohere nce length L(phi)(T) and the percolation correlation length xi(p). The results of our calculation confirm that weak electron localization in 2d is modified by the fractal properties of thin percolating films.