Regensburg 2025 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Poster: Statistical Physics

DY 22.29: Poster

Mittwoch, 19. März 2025, 10:00–12:00, P3

Relating Thermodynamics and Dynamics in a Trap-like Model of Supercooled Liquids — •Simon Kellers, Anshul D. S. Parmar, and Andreas Heuer — Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany

Previous studies on 2D non-network glass formers utilized the million-fold acceleration of Swap Monte-Carlo and potential energy landscape (PEL) analysis to establish a connection between deviations from Gaussian behavior of the inherent structure (IS) density function, Fragile-to-Strong-Crossover [1] and a low-energy depletion regime. In recent work [2] a specific low-temperature behavior for thermodynamical (IS-energy) and dynamical (apparent activation energy) observables could be observed with basically the same onset temperature. To understand the physical background we investigate various model IS distributions in a trap-like picture and their derived dynamic and thermodynamic properties. Indeed, for different realizations of non-Gaussianity in the PEL strong correlations between the respective onset temperatures are observed as well, suggesting indeed a strong correlation between thermodynamics and dynamics. These results contribute to our understanding of the PEL picture of glass formers.

[1] A. Heuer, J. Condens. Matter Phys. 2008, 20, 373101

[2] A. D. S. Parmar, A. Heuer, 2023 arXiv preprint arXiv:2307.10143

Keywords: Potential Energy Landscape; Supercooled Liquids