Macroscopic inhomogeneities have a profound effect on electrical conductivity in the presence of a strong magnetic field B. One expression of this is the appearance of a new physical length in the system, which increases with B and is unbounded. This length characterizes the extra distortions of...

A number of physical and physicochemical properties of granular materials can be traced to the nature of the interfaces and contact between the grains. In this paper we deal more specifically with the electrical resistance of the inter-granular contacts. More generally we will consider the...

We show that the intensities of the local electric field in metal-dielectric granular films may exhibit giant fluctuations in the optical and infrared range when the dissipation in metallic grains is low. It is found that these fluctuations are highly correlated in space. We introduce a new...