Starr, Francis W. ; Sastry, Srikanth ; Douglas, Jack F. ; Glotzer, Sharon C. (2002) What do we learn from the local geometry of glass-forming liquids? Physical Review Letters, 89 (12). 125501_1-125501_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v89/i12/e125501
Related URL: http://dx.doi.org/10.1103/PhysRevLett.89.125501
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(vV) 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 <vf> along a path of constant density and find that <vf> extrapolates to zero at the same temperature T0 that the extrapolated relaxation time diverges. We relate <vf> to the Debye-Waller factor, which is measurable by neutron scattering.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 50142 |
| Deposited On: | 21 Jul 2011 14:27 |
| Last Modified: | 21 Jul 2011 14:27 |
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