Starr, F.
, Sastry, S.
, Douglas, J.
and Glotzer, S.
(2002),
What Do We Learn From the Local Geometry of Glass-Forming Liquids?, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852078
(Accessed April 19, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
What Do We Learn From the Local Geometry of Glass-Forming Liquids?
Published
Author(s)
, Srikanth Sastry, ,
Abstract
We examine the local geometry of a simulated glass-forming polymer melt. Using the Voronoi construction, we find that the distributions of Voronoi volume $P(v_V)$ and asphericity $P(a)$ appear to be universal properties of dense liquids, supporting the use of packing approaches to understand liquid properties. We also calculate the average free volume $\langle v_f \rangle$ along a path of constant density and find that $\langle v_f \rangle$ extrapolates to zero at the same temperature $T_0$ that the extrapolated relaxation time diverges. We relate $\langle v_f \rangle$ to the Debye-Waller factor.Citation
Physical Review Letters
Volume
89
Issue
No. 12
Pub Type
Journals
Download Paper
Keywords
free volume, glass transion, inelastic, neutron scattering
Citation
Created September 1, 2002, Updated February 17, 2017