AC transport in granular metals

Abstract

AC properties of granular metals nowadays constitute a field of both theoretical and experimental research. In this TFG, we analyze the ac response of granular Co-ZrO2, whose ac electron transport is characterised by randomly competing capacitive conductance and thermally assisted tunneling. Besides, we show that the conductivity, as a function of the frequency, follows a power law which is characteristic of most disordered dielectric materials. The random RC network model will be our tool to discuss WinSpice simulations and drawing conclusions