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Evidence for a Dynamical Crossover in a Supercooled Liquid From Analysis of its Potential Energy Landscape

Published

Author(s)

T B. Schroder, Srikanth Sastry, J C. Dyre, S C. Glotzer

Abstract

We map the dynamics of a supercooled liquid to transitions between successive potential energy basins. In terms of the self intermediate scattering function, Fs (q,t), we demonstrate that the separation of the system=s dynamics into (i) vibrations within potential basins and (ii) transitions between them, becomes valid as a crossover temperature, Tx , is approached. Our results support the previously proposed identification of Tx with the mode coupling critical temperature, Tc. Preliminary results indicate that transitions between inherent structures at T > Tc involve cooperative particle motion.
Citation
Physical Review Letters

Keywords

energy landscape, glassforming liquids, inherent structures, MD simulations

Citation

Schroder, T. , Sastry, S. , Dyre, J. and Glotzer, S. (2021), Evidence for a Dynamical Crossover in a Supercooled Liquid From Analysis of its Potential Energy Landscape, Physical Review Letters (Accessed February 20, 2024)
Created October 12, 2021