Density expansion of transport coefficients on a 2D site-disordered lattice. II

For pt.I see ibid, vol.20, p.1043, 1987. For a hopping model on a square lattice with a fraction c of sites randomly replaced by impurities, the static conductivity and diffusion coefficients can be expanded in powers of the concentration c. The authors calculate the exact coefficients of O(c) and O(c2) using analytical and numerical methods, and the results are compared with computer simulations.

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