Dimensionless parameter of structural ordering and excess entropy of metallic and tellurite glasses

2023/08/03 by A. S. Makarov, Makarov, A. S., G.V. Afonin +11
Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Phase-change materials and chalcogenides #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.2308.01660

Abstract

Using a notion on the excess entropy of glass with respect to the counterpart crystal, we introduce a simple dimensionless order parameter ξ, which changes from ξ→ 0 to ξ→ 1. The former case corresponds to a strongly disordered liquid-like structure while the latter situation describes a highly ordered crystal-like glass. This approach is applied to 13 metallic and 2 tellurite glasses. We found that ξ is strongly sensitive to structural state and/or chemical composition. It can be also used for a comparison of the order in glasses belonging to different classes and appear to represent a new way of structural analysis.

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