Direct Measurement of the Structural Change Associated with Amorphous Solidification using Static Scattering of Coherent Radiation

• DOI: 10.48550/arxiv.2302.11872
• Publication Date: 2023-01-01
• Authors: Charlotte F. Pete...; Peter Harrowell
• Keywords: Supercooling; Structure factor; Intensity; Debye–Waller factor

In this paper we demonstrate that the weak temperature dependence of structure factor supercooled liquids, a defining feature glass transition, is consequence averaging scattering intensity either due to use an incoherent radiation source or explicit angular averaging. We show speckle at individual wavevectors, calculated from simulated former, exhibits Debye-Waller with sufficiently large represent structural order parameter capable distinguishing liquid glass. also extract intensities quantity proportional variance local restraint, i.e. direct experimental measure amplitude heterogeneity.