Sun, Gang; Lu, Kunquan; Kun, Ferenc
Percolation-induced conductor-insulator transition in a system of metal spheres in a dielectric fluid
PHYSICAL REVIEW E, 83 Art. No. 041405, APR 15 2011

We develop a model to investigate the insulator-conductor transition observed in a system of spherical metal particles suspended in a quasi-two-dimensional viscous liquid between planar electrodes when the voltage of the electrodes is increased. Our model captures the main ingredients of the process in experimental system, and reveals the insulator-conductor transition at a well-defined critical voltage. Based on the simulation data we demonstrate that characteristic quantities of the system show power-law scaling in the vicinity of the critical point. These scaling analysis show clearly that the transition between the insulating and conducting phases is analogous to second-order phase transitions.

DOI:10.1103/PhysRevE.83.041405

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