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Updated: Apr 19, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Role of Structure and Entropy in Determining Differences in Dynamics for Glass Formers with Different Interaction
Atreyee Banerjee1, Shiladitya Sengupta2, Srikanth Sastry3
1Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411008, India.
Abstract:
We present a study of two model liquids with different interaction potentials, exhibiting similar structure but significantly different dynamics at low temperatures. By evaluating the configurational entropy, we show that the differences in the dynamics of these systems can be understood in terms of their thermodynamic differences. Analyzing their structure, we demonstrate that differences in pair correlation functions between the two systems, through their contribution to the entropy, dominate the differences in their dynamics, and indeed overestimate the differences. Including the contribution of higher order structural correlations to the entropy leads to smaller estimates for the relaxation times, as well as smaller differences between the two studied systems.
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