Role of percolation in diffusion on random lattices

Details Role of percolation in diffusion on random lattices Role of percolation in diffusion on random lattices

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrve..52.3570h&link_type=abstract

Physical Review E (Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics), Volume 52, Issue 4, October 1995

Physics

12

Theory Of Diffusion And Ionic Conduction In Solids

Scientific paper

Diffusion of single particles on lattices with random distributions of static barriers (random-barrier model) is investigated by Monte Carlo simulations and the time-dependent effective-medium approximation. The crossover from anomalous to linear diffusive behavior is discussed in terms of a percolation model. For a discrete distribution of barrier heights with a small concentration of ``defect'' barriers at the percolation threshold, an alternative kind of transition from bulk-controlled to defect-controlled diffusion is observed as the temperature decreases.

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