The electric behaviour of high Tc oxides is analyzed on assuming a model of granular metals, in which conducting islands of radius d are separated by insulating barriers of width s. The conductivity as a function of temperature, averaged over conducting channels with a probability distribution is determined, on considering tunnelling across the barriers and the charging energy.
Quantum percolation metal-insulator transition in high Tc oxides
DALLACASA, Valerio;
1997-01-01
Abstract
The electric behaviour of high Tc oxides is analyzed on assuming a model of granular metals, in which conducting islands of radius d are separated by insulating barriers of width s. The conductivity as a function of temperature, averaged over conducting channels with a probability distribution is determined, on considering tunnelling across the barriers and the charging energy.
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