Tunneling-percolation origin of nonuniversality: Theory and experiments

A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponent t, in disagreement with the standard theory of percolation which predicts t


Published in:
Physical Review B, 71, 6, 064201
Year:
2005
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Article assez complet: théorie + expériences (verre+RuO2). Théorie: - modèle: percolation + effet tunnel entre particules - simulations Monte Carlo - développement de la piézorésistivité : G(hydrostatique), G(parallèle) et G(perpendiculaire); Gh=Gpar+2Gperp Résultats: sur V6 & RuO2, cuits entre 525 et 600°C.
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 Record created 2006-06-27, last modified 2018-01-27

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