Details

Autor(en) / Beteiligte

• Buisson, L.
• Ciliberto, S.

Titel

Off equilibrium fluctuations in a polymer glass

Ist Teil von

• Physica. D, 2005-05, Vol.204 (1), p.1-14

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2005

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• The fluctuation–dissipation relation (FDR) is measured on the dielectric properties of a polymer glass (polycarbonate). It is observed that the fluctuation–dissipation theorem is strongly violated after 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 1 Hz, it may persist for several hours. The origin of this violation is a highly intermittent dynamics characterized by large fluctuations and 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.