English

Square lattice site percolation at increasing ranges of neighbor interactions

Statistical Mechanics 2007-05-23 v1 Disordered Systems and Neural Networks

Abstract

We report site percolation thresholds for square lattice with neighbor interactions at various increasing ranges. Using Monte Carlo techniques we found that nearest neighbors (N2^2), next nearest neighbors (N3^3), next next nearest neighbors (N4^4) and fifth nearest neighbors (N6^6) yield the same pc=0.592...p_c=0.592.... At odds, fourth nearest neighbors (N5^5) give pc=0.298...p_c=0.298.... These results are given an explanation in terms of symmetry arguments. We then consider combinations of various ranges of interactions with (N2^2+N3^3), (N2^2+N4^4), (N2^2+N3^3+N4^4) and (N2^2+N5^5). The calculated associated thresholds are respectively pc=0.407...,0.337...,0.288...,0.234...p_c=0.407..., 0.337..., 0.288..., 0.234.... The existing Galam--Mauger universal formula for percolation thresholds does not reproduce the data showing dimension and coordination number are not sufficient to build a universal law which extends to complex lattices.

Keywords

Cite

@article{arxiv.cond-mat/0408338,
  title  = {Square lattice site percolation at increasing ranges of neighbor interactions},
  author = {K. Malarz and S. Galam},
  journal= {arXiv preprint arXiv:cond-mat/0408338},
  year   = {2007}
}

Comments

4 pages, revtex4