Off equilibrium fluctuations in a polymer glass
Disordered Systems and Neural Networks
2009-11-10 v2 Materials Science
Abstract
The fluctuation-dissipation relation (FDR) is measured on the dielectric properties a polymer glass (polycarbonate). It is observed that the fluctuation dissipation theorem is strongly violated for a quench from above to below the glass transition temperature. The amplitude and the persistence time of this violation are decreasing functions of frequency. Around it may persist for several hours. The origin of this violation is a highly intermittent dynamics characterized by large fluctuations a strongly non-Gaussian statistics. The intermittent dynamics depends on the quenching rate and it disappears after slow quenches. The relevance of these results for recent models of aging are discussed.
Cite
@article{arxiv.cond-mat/0411252,
title = {Off equilibrium fluctuations in a polymer glass},
author = {L. Buisson and S. Ciliberto},
journal= {arXiv preprint arXiv:cond-mat/0411252},
year = {2009}
}
Comments
submitted to Physica D