ac Hopping Conduction at Extreme Disorder Takes Place on the Percolating Cluster
作者： Thomas B. Schrøder , Jeppe C. Dyre
DOI: 10.1103/PHYSREVLETT.101.025901
关键词:
摘要: Simulations of the random barrier model show that ac currents at extreme disorder are carried almost entirely by percolating cluster slightly above threshold; thus contributions from isolated low-activation-energy clusters negligible. The effective medium approximation in conjunction with Alexander-Orbach conjecture lead to an excellent analytical fit universal conductivity no nontrivial fitting parameters.
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