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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2019, Tutor: Almílcar Labarta Rodríguez

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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