Voylov DN, Griffin PJ, Mercado B, Keum JK, Nakanishi M, Novikov VN, Sokolov AP. Correlation between temperature variations of static and dynamic properties in glass-forming liquids.
Phys Rev E 2016;
94:060603. [PMID:
28085393 DOI:
10.1103/physreve.94.060603]
[Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 11/07/2022]
Abstract
Detailed analysis of the static structure factor S(Q) in several glass-forming liquids reveals that the temperature variations of the width of the main diffraction peak ΔQ(T) correlate with the fragility of these liquids. This observation suggests a direct connection between rather subtle structural changes and sharp slowing down of structural relaxation in glass-forming liquids. We show that this observation can be rationalized using the Adam-Gibbs approach, through a connection between temperature variations of structural correlation length, l_{c}∼2π/ΔQ, and the size of cooperatively rearranging regions.
Collapse