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Updated: May 7, 2026
09:32
Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Overlap fluctuations in glass-forming liquids
1Laboratoire Charles Coulomb, UMR 5221, CNRS and Université Montpellier 2, Montpellier, France.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 17, 2013
Summary
We numerically analyzed thermal fluctuations in glass-forming liquids. Slow dynamics correlate with non-Gaussian overlap distributions, indicating significant structural changes during the glass transition.
Area of Science:
- Condensed matter physics
- Statistical mechanics
- Materials science
Background:
- Glass-forming liquids exhibit slow dynamics near the glass transition.
- Understanding the nature of thermodynamic fluctuations is crucial for explaining glassy behavior.
Purpose of the Study:
- To numerically investigate thermal fluctuations of static overlap in glass-forming liquids.
- To correlate slow dynamics with changes in overlap fluctuation distributions.
- To explore the existence of a phase transition induced by a thermodynamic field conjugate to the overlap.
Main Methods:
- Numerical analysis of thermal fluctuations.
- Calculation of static overlap between equilibrium configurations.
- Measurement of overlap fluctuations using annealed and quenched definitions.
- Investigation of a thermodynamic field conjugate to the overlap.
Main Results:
- Slow dynamics near the onset temperature correlate with non-Gaussian probability distributions of overlap fluctuations.
- A first-order phase transition is induced by a thermodynamic field conjugate to the overlap below a critical temperature.
- The existence of this phase transition is numerically demonstrated in the annealed case.
Conclusions:
- The approach to the glass transition involves profound changes in thermodynamic fluctuations.
- Glassy dynamics are accompanied by significant structural evolution, challenging previous views.
- Numerical evidence supports a first-order phase transition in the annealed overlap system.
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