Configuration Space Connectivity across the Fragile-to-Strong Transition in Silica

2001/08/31 by Emilia La Nave, H. Eugene Stanley, Francesco Sciortino · 6 citations
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #High-pressure geophysics and materials #Material Dynamics and Properties #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.soft

paper · pdf · doi:10.1103/physrevlett.88.035501

arxiv created 2001/08/31 · openalex publication_date 2002/01/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a numerical analysis for SiO (2) of the fraction of diffusive direction f(diff) for temperatures T on both sides of the fragile-to-strong crossover. The T dependence of f(diff) clearly reveals this change in dynamical behavior. We find that for T above the crossover (fragile region) the system is always close to ridges of the potential energy surface (PES), while below the crossover (strong region), the system mostly explores the PES local minima. Despite this difference, the power law dependence of f(diff) on the diffusion constant, as well as the power law dependence of f(diff) on the configurational entropy, shows no change at the fragile-to-strong crossover.

Citations

• On the Temperature Dependence of Cooperative Relaxation Properties in Glass-Forming Liquids

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