The Statistics of Inherent Structure Stress in a Supercooled Liquid


Peter Harrowell (University of Sydney)


The existence of a distribution of shear stress associated with the local potential minima (inherent structures) of a liquid provides the essential reason why stress relaxation must be activated since this ‘inherent’ stress can only be relaxed through multiple transitions about the energy landscape of the liquid. We still know very little about the material factors that determine the statistics of this inherent stress nor how local particle rearrangements are translated into stress changes. In this talk we present evidence that the total inherent stress is the result of the sum of only weakly correlated individual particle stresses and explore the connection between these stresses and the force network of the inherent structures. The relationship between the variance of the inherent stress fluctuations and the elastic modulus of a glass at non-zero temperatures is considered.

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