Conductance fluctuations in random resistor networks

One of the common models of studying percolation is random graphs with random resistance in the edges. Clearly there is no conductance of the network below pc. Since 1970s, a significant amount was effort was given to understand the scaling of conductance near percolation threshold and therefore conductance exponents were introduced that depended on dimension of the system. Near percolation threshold, it was observed that the distribution of current in the network is broad and different moment scale differently; hence they were termed multifractal. In this work, we studied conductance and its fluctuations away from the percolation threshold. We use different class of bond diluted models for comparison.

potential distribution
Fig: Above figure shows the potential at different sites in the network at steady state and we can clearly interesting patterns emerging out.

References

  1. D. Stauffer and A. Aharony, Introduction to Percolation Theory, Taylor & Francis (1992).
  2. B. Bollobás and O. Riordan, Percolation, Cambridge University Press (2006).
  3. A. A. Saberi, Recent advances in percolation theory and its applications, Phys. Rep. 578, 1 (2015).
  4. S. Kirkpatrick, Classical transport in disordered media, Phys. Rev. Lett. 27, 1722 (1971).
  5. S. Kirkpatrick, Percolation and conduction, Rev. Mod. Phys. 45, 574 (1973).
  6. A. B. Harris and R. Fisch, Conductivity near the percolation threshold, Phys. Rev. Lett. 38, 796 (1977).
  7. J. P. Straley, Critical exponents for the conductivity of random resistor lattices, Phys. Rev. B 15, 5733 (1977).
  8. I. Webman, J. Jortner, and M. H. Cohen, Critical behavior of conductivity in random systems, Phys. Rev. B 16, 2593 (1977).
  9. P. G. de Gennes, On a relation between percolation theory and conductivity, J. Physique Lett. 37, 1 (1976).
  10. L. de Arcangelis, S. Redner, and A. Coniglio, Multifractal nature of current distribution in random resistor networks, Phys. Rev. B 34, 4656 (1986).
  11. B. I. Shklovskii and A. L. Efros, Percolation theory and conductivity of disordered systems, Sov. Phys. Usp. 18, 845 (1975).
  12. J. Cserti, G. Dávid, and A. Piróth, Application of resistor networks in physics problems, Am. J. Phys. 70, 153 (2002).
  13. S. Torquato, Hyperuniform states of matter, Phys. Rep. 745, 1 (2018).
  14. I. Mukherjee and P. K. Mohanty, Transport in disordered systems with correlated structures, J. Phys.: Condens. Matter 36, 465401 (2024).
  15. S. Mitra, I. Mukherjee, and P. K. Mohanty, Conductance fluctuations in disordered networks, Phys. Rev. E 112, 014120 (2025).

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