Charge transport in a dynamical system of interacting particles

We propose an off-lattice resistor network as a conceptual framework for el ectrical transport in two-dimensional systems of interacting particles. The particles are considered as charge carriers and the molecular dynamics tec hnique is applied to simulate the time evolution of the resulting network t opology. The conductance of the off-lattice network is numerically calculat ed at each time step and the resulting time series is analyzed for the pres ence of long-range correlations. Our simulations with Lennard-Jones and soi l-core types of interaction potentials indicate that the conductance of the dynamical system displays power-law correlations in time with an exponent that is significantly dependent on the temperature. (C) 2000 Elsevier Scien ce B.V. All rights reserved.