Intermittent origin of the large violations of the fluctuation-dissipation relations in an aging polymer glass
Fecha de publicación: 
2003
Cita: 
L. Buisson, S. Ciliberto and A. Garcimartín “Intermittent origin of the large violations of the fluctuation-dissipation relations in an aging polymer glass”. Europhys. Lett. 63, 4, 603-609, (2003).
Resumen
The fluctuation-dissipation relation (FDR)is measured on the dielectric properties of a polymer glass (polycarbonate)in the range 20 mHz–100Hz. It is found that after a quench below the glass transition temperature, the fluctuation-dissipation theorem is strongly violated. The amplitude and the persistence time of this violation are decreasing functions of frequency. At frequencies larger than 1Hz it persists for about 3 h. The origin of this violation is a highly intermittent dynamics characterized by large fluctuations. The relevance of these results for recent models of aging dynamics is discussed.

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2003.EPL.63.pdf
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