Simple Lattice-Models of Ion Conduction: Counter Ion Model vs. Random Energy Model

Details Simple Lattice-Models of Ion Conduction: Counter Ion Model vs. Random Energy Model Simple Lattice-Models of Ion Conduction: Counter Ion Model vs. Random Energy Model

2002-06-21

arxiv.org/abs/cond-mat/0206402v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

To be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.064301

The role of Coulomb interaction between the mobile particles in ionic conductors is still under debate. To clarify this aspect we perform Monte Carlo simulations on two simple lattice models (Counter Ion Model and Random Energy Model) which contain Coulomb interaction between the positively charged mobile particles, moving on a static disordered energy landscape. We find that the nature of static disorder plays an important role if one wishes to explore the impact of Coulomb interaction on the microscopic dynamics. This Coulomb type interaction impedes the dynamics in the Random Energy Model, but enhances dynamics in the Counter Ion Model in the relevant parameter range.

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