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Journal articles
Evidence of growing spatial correlations at the glass transition from nonlinear susceptibility measurements
Abstract : The ac nonlinear dielectric response 3
ð!; TÞ of glycerol was measured close to its glass transition
temperature Tg to investigate the prediction that supercooled liquids respond in an increasingly nonlinear
way as the dynamics slows down (as spin glasses do). We find that 3
ð!; TÞ indeed displays several
nontrivial features. It is peaked as a function of the frequency ! and obeys scaling as a function of !ðTÞ,
with ðTÞ the relaxation time of the liquid. The height of the peak, proportional to the number of
dynamically correlated molecules Ncorr
ðTÞ, increases as the system becomes glassy, and 3 decays as a
power law of ! over several decades beyond the peak. These findings confirm the collective nature of the
glassy dynamics and provide the first direct estimate of the T dependence of Ncorr
Cited literature [12 references]
https://hal-cea.archives-ouvertes.fr/cea-01396584
Contributor : Dominique Girard <>
Submitted on : Monday, November 14, 2016 - 4:12:09 PM
Last modification on : Monday, February 10, 2020 - 6:13:40 PM
Long-term archiving on: : Tuesday, March 21, 2017 - 12:30:16 PM
Contributor : Dominique Girard <>
Submitted on : Monday, November 14, 2016 - 4:12:09 PM
Last modification on : Monday, February 10, 2020 - 6:13:40 PM
Long-term archiving on: : Tuesday, March 21, 2017 - 12:30:16 PM
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