Space-resolved dynamics of a tracer in a disordered solid

2010/04/21 by Thomas Franosch, Markus Spanner, Teresa Bauer +3 · 18 citations
Materials Science · Mathematics · Physics and Astronomy · #Diffusion #Dynamics (music) #Glass properties and applications #Material Dynamics and Properties #Mathematics #Molecular dynamics #Physics #Quantum mechanics #Scaling #Statistical physics #TRACER #Theoretical and Computational Physics #Thermodynamics #cond-mat.soft #cond-mat.stat-mech

paper · pdf · doi:10.1016/j.jnoncrysol.2010.06.051

published in Journal of Non-Crystalline Solids 357(2), 472-478 (Elsevier BV) · 10 pages, 7 figures, submitted to Journal of Non-Crystalline Solids

arxiv created 2010/04/21 · openalex publication_date 2010/09/03 · arxiv updated 2011/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The dynamics of a tracer particle in a glassy matrix of obstacles displays slow complex transport as the free volume approaches a critical value and the void space falls apart. We investigate the emerging subdiffusive motion of the test particle by extensive molecular dynamics simulations and characterize the spatio-temporal transport in terms of two-time correlation functions, including the time-dependent diffusion coefficient as well as the wavenumber-dependent intermediate scattering function. We rationalize our findings within the framework of critical phenomena and compare our data to a dynamic scaling theory.

Citations

• Liquid-Glass Transition of a Fluid Confined in a Disordered Porous Matrix: A Mode-Coupling Theory
• Crossover in the Slow Decay of Dynamic Correlations in the Lorentz Model
• Effect of composition changes on the structural relaxation of a binary mixture
• Nearly logarithmic decay in the colloidal hard-sphere system
• Highly accelerated simulations of glassy dynamics using GPUs: Caveats on limited floating-point precision
• Critical dynamics of ballistic and Brownian particles in a heterogeneous environment
• Structural relaxation in orthoterphenyl: a schematic mode-coupling-theory model analysis
• Mixing Effects for the Structural Relaxation in Binary Hard-Sphere Liquids
• Higher-order glass-transition singularities in colloidal systems with attractive interactions

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