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Updated: May 17, 2026
09:32
Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
General two-parameter model of alpha-relaxation in glasses.
Valeriy V Ginzburg1, Oleg Gendelman2, Riccardo Casalini3
1Michigan State University, Department of Chemical Engineering and Materials Science, East Lansing, Michigan 48824, USA.
Physical Review. E
|May 16, 2026
Summary
Many glass formers simplify complex relaxation behaviors using a general scaling law. This discovery reduces the required parameters for describing glass transition dynamics, offering a more unified understanding of these materials.
Area of Science:
- Materials Science
- Physical Chemistry
- Condensed Matter Physics
Background:
- Glass formers exhibit complex relaxation dynamics near the glass transition.
- Relaxation times show a super-Arrhenius temperature dependence, deviating from high-temperature Arrhenius behavior.
- Describing this behavior traditionally requires five parameters.
Purpose of the Study:
- To demonstrate a general scaling behavior in glass formers' relaxation times.
- To reduce the number of parameters needed for a comprehensive description.
- To connect this scaling to the two-state, two-(time) scale (TS2) theory.
Main Methods:
- Analysis of relaxation time data for various glass formers.
- Development and application of a general scaling approach.
- Regression of parameters using the two-state, two-(time) scale (TS2) theory.
- Exploration of connections to the Hall-Wolynes elastic relaxation theory.
Main Results:
- Many glass formers exhibit a general scaling law for relaxation times.
- This scaling requires only two material-specific parameters, simplifying descriptions.
- The master curve is well-described by the TS2 theory.
- Material-independent constants were identified.
Conclusions:
- A universal scaling law simplifies the description of glass former relaxation dynamics.
- The TS2 theory provides a robust framework for understanding this behavior.
- This work offers a more unified approach to studying glass transition phenomena.
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