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Updated: Mar 1, 2026
09:32
Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
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Universal activated aging and weak ergodicity breaking in spin and structural glasses.
Bin Li1,2, Deng Pan1, Ting Qu1,2
1Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.
Science Advances
|February 27, 2026
Summary
This study introduces a new trap model for activated aging in glasses, explaining how energy barriers influence dynamics. It predicts distinct aging behaviors during cooling and provides a phase diagram for glassy systems.
Area of Science:
- Condensed matter physics
- Materials science
- Statistical mechanics
Background:
- Glasses exhibit complex energy landscapes and nonequilibrium aging dynamics.
- Understanding these dynamics is crucial for materials science and condensed matter physics.
Purpose of the Study:
- To propose a generalized trap model for activated aging in glasses.
- To link aging dynamics to the energy landscape's static properties, specifically energy barrier distribution.
- To develop a unified phase diagram for aging dynamics in glassy systems.
Main Methods:
- Developed a generalized trap model for activated aging.
- Analyzed the distribution of energy barriers in glass energy landscapes.
- Used the random energy model for rigorous testing.
- Investigated paradigmatic structural glasses like the Weeks-Chandler-Andersen (WCA) model and amorphous silica.
Main Results:
- Predicted weak ergodicity breaking (WEB) preceding strong ergodicity breaking during cooling.
- Showed that activation cluster sizes correlate with the time-correlation function's decay.
- Observed universal aging behavior across different glass models.
- Extracted a static length from WCA model dynamics, supporting the random first-order transition scenario.
Conclusions:
- The proposed trap model accurately describes activated aging in glasses.
- The study provides a framework for understanding the relationship between static properties and dynamic behavior.
- A unified ergodic-WEB phase diagram for glassy systems was proposed.
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