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Updated: Jun 6, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Published on: June 7, 2018

Simple Fluctuations in Simple Glass Formers.

Corentin C L Laudicina¹, Patrick Charbonneau^2,3, Yi Hu²

¹Soft Matter and Biological Physics, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

The Journal of Physical Chemistry. B

|November 26, 2024

Summary

This summary is machine-generated.

Critical fluctuations in glass-forming liquids are key to understanding glass formation. Mode-coupling theory (MCT) and dynamical mean-field theory (DMFT) show dimensional scaling inconsistencies, with simulations favoring DMFT.

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Area of Science:

Physics
Soft Matter Physics
Computational Physics

Background:

Critical single-particle fluctuations are fundamental to glass-forming liquids, especially in high dimensions.
These fluctuations leave a pseudocritical signature in all finite dimensions, offering a test for glass formation theories.

Purpose of the Study:

To investigate critical fluctuations using the non-Gaussian parameter.
To compare predictions from mode-coupling theory (MCT) and dynamical mean-field theory (DMFT) across various dimensions.
To test these theories using hard sphere fluids and the Mari-Kurchan model.

Main Methods:

Analysis of critical fluctuations via the non-Gaussian parameter.
Theoretical examination within Mode-Coupling Theory (MCT) and Dynamical Mean-Field Theory (DMFT).
Dimensional scaling analysis for hard sphere fluids and the Mari-Kurchan model.

Main Results:

Established general scaling laws for liquid dynamics theories in large dimensions.
Demonstrated inconsistencies between MCT and DMFT dimensional scalings.
Simulation data for hard sphere fluids supported the DMFT scenario in finite dimensions.

Conclusions:

Dynamical Mean-Field Theory (DMFT) appears more relevant for capturing glass physics in finite dimensions than MCT.
Identified potential modifications for MCT to incorporate mean-field physics.
Highlighted the nontrivial influence of local structure and spatial dimensionality on critical fluctuations.