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Direct measurement of the structural change associated with amorphous solidification using static scattering of coherent radiation.
- Source :
-
Journal of Chemical Physics . 12/28/2023, Vol. 159 Issue 24, p1-7. 7p. - Publication Year :
- 2023
-
Abstract
- In this paper, we demonstrate that the weak temperature dependence of the structure factor of supercooled liquids, a defining feature of the glass transition, is a consequence of the averaging of the scattering intensity due to angular averaging. We show that the speckle at individual wavevectors, calculated from a simulated glass former, exhibits a Debye–Waller factor with a sufficiently large temperature dependence to represent a structural order parameter capable of distinguishing liquid from glass. We also extract from the speckle intensities a quantity proportional to the variance of the local restraint, i.e., a direct experimental measure of the amplitude of structural heterogeneity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 159
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 174524224
- Full Text :
- https://doi.org/10.1063/5.0177251