Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-02-02
Phys. Rev. E 69, 031107 (2004)
Physics
Condensed Matter
Disordered Systems and Neural Networks
7 pages, 5 figures, to be published in Phys. Rev. E
Scientific paper
10.1103/PhysRevE.69.031107
An anisotropic random barrier model is presented, in which the transition probabilities in different directions have different probability density functions. At low temperatures, the anisotropic long--time diffusion coefficients, obtained using an effective medium approximation, follow an Arrhenius temperature dependence, with the same activation energy for each direction. Such activation energy is related to the anisotropic percolation properties of the lattice, and can be analysed in terms of the critical percolation path approximation. The anisotropic effective medium approximation is shown to predict the correct percolation threshold for an anisotropic two--dimensional square lattice. In addition, results are compared with numerical simulations using a fast kinetic Monte Carlo algorithm.
No associations
LandOfFree
Diffusion and percolation in anisotropic random barrier models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Diffusion and percolation in anisotropic random barrier models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffusion and percolation in anisotropic random barrier models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-627493