Localization phenomena in models of ion-conducting glass formers
Abstract
The mass transport in soft-sphere mixtures of small and big particles as well as in the disordered Lorentz gas (LG) model is studied using molecular dynamics (MD) computer simulations. The soft-sphere mixture shows anomalous small-particle diffusion signifying a localization transition separate from the big-particle glass transition. Switching off small-particle excluded volume constraints slows down the small-particle dynamics, as indicated by incoherent intermediate scattering functions. A comparison of logarithmic time derivatives of the mean-squared displacements reveals qualitative similarities between the localization transition in the soft-sphere mixture and its counterpart in the LG. Nevertheless, qualitative differences emphasize the need for further research elucidating the connection between both models.
Keywords
Cite
@article{arxiv.1006.0790,
title = {Localization phenomena in models of ion-conducting glass formers},
author = {Jürgen Horbach and Thomas Voigtmann and Felix Höfling and Thomas Franosch},
journal= {arXiv preprint arXiv:1006.0790},
year = {2010}
}
Comments
to appear in Eur. Phys. J. Special Topics