Correlation between temperature variations of static and dynamic properties in glass-forming liquids.
basic_science · Level V
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- Record sourced from PubMed, PMID 28085393.
- Also identified by DOI 10.1103/PhysRevE.94.060603.
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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.