Direct evidence for a characteristic dynamic lengthscale in the intermediate phase of glasses

2010/07/23 by M. Micoulaut, M. Malki, Micoulaut, M. +1
Materials Science · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Glass properties and applications #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1007.4224

4 pages, 3 figures

arxiv created 2010/07/23 · openalex publication_date 2010/07/23 · arxiv updated 2010/07/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

AC conductivity spectra of xAgI-(1-x)AgPO₃ fast ion conducting glasses spanning the flexible, intermediate (isostatically rigid) and stressed rigid phases are analyzed. The rescaled frequency dependent spectra are mapped into time-dependent mean square displacements out of which a typical lengthscale characterizing the spatial extent √(⟨ R²(∞)⟩) of non-random diffusion paths is computed. The latter quantity is studied as a function of AgI composition, it is found to display a maximum in the intermediate phase, providing the first clear evidence of a typical lengthscale of a dynamical nature when a system becomes isostatically rigid and enters the intermediate phase.

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