INVESTIGADORES
GRIGERA Tomas Sebastian
artículos
Título:
Observation of Fluctuation-Dissipation-Theorem Violations in a Structural Glass
Autor/es:
GRIGERA, T. S.; ISRAELOFF, N. E.
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Año: 1999 vol. 83 p. 5038 - 5041
ISSN:
0031-9007
Resumen:
The fluctuation-dissipation theorem
(FDT), connecting dielectric susceptibility and polarization noise, was
studied in glycerol below its glass transition temperature Tg. Weak FDT violations were observed after a quench from just above to just below Tg, for frequencies above the α peak. Violations persisted up to 105
times the thermal equilibration time of the configurational degrees of
freedom under study, but comparable to the average relaxation time of
the material. These results suggest that excess energy flows from
slower to faster relaxing modes.
