Crossover from fragile to strong glassy behavior in kinetically constrained systems

2001/04/18 by Arnaud Buhot, Juan P. Garrahan · 3 citations
Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Material Dynamics and Properties #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.stat-mech

paper · pdf · doi:10.1103/physreve.64.021505

published as Phys. Rev. E 64, 21505 (2001) · 4 pages, 3 figures

arxiv created 2001/04/18 · openalex publication_date 2001/07/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show the existence of fragile-to-strong transitions in kinetically constrained systems by studying the equilibrium and out-of-equilibrium dynamics of a generic constrained Ising spin chain that interpolates between the symmetric and fully asymmetric cases. We find that for large but finite asymmetry the model displays a crossover from fragile to strong glassy behavior at finite temperature, which is controlled by the asymmetry parameter. The relaxation in the fragile region presents stretched exponential behavior, with a temperature dependent stretching exponent that is predicted. Our results are confirmed by numerical simulations.

Citations

• Glassy Time-Scale Divergence and Anomalous Coarsening in a Kinetically Constrained Spin Chain
• Models of Hierarchically Constrained Dynamics for Glassy Relaxation

Cited by

• Anomalous coarsening and glassy dynamics
• Violation of the fluctuation–dissipation theorem in glassy systems: basic notions and the numerical evidence
• Space-time phase transitions in the East model with a softened kinetic constraint