Physics – Condensed Matter – Materials Science
Scientific paper
1999-11-09
Physics
Condensed Matter
Materials Science
6 pages, 4 figures
Scientific paper
10.1103/PhysRevB.61.6057
Recent measurements on ion conducting glasses have revealed that conductivity spectra for various temperatures and ionic concentrations can be superimposed onto a common master curve by an appropriate rescaling of the conductivity and frequency. In order to understand the origin of the observed scaling behavior, we investigate by Monte Carlo simulations the diffusion of particles in a lattice with site energy disorder for a wide range of both temperatures and concentrations. While the model can account for the changes in ionic activation energies upon changing the concentration, it in general yields conductivity spectra that exhibit no scaling behavior. However, for typical concentrations and sufficiently low temperatures, a fairly good data collapse is obtained analogous to that found in experiment.
Bunde Armin
Dieterich Wolfgang
Maass Philipp
Meyer Martin
Porto Markus
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