Excitations Are Localized and Relaxation Is Hierarchical in Glass-Forming Liquids

By Aaron S. Keys, Lester O. Hedges, Juan P. Garrahan, Sharon C. Glotzer, D. Chandler. 2011

206 citations recorded by the source corpus.

Supercooled glass-forming liquids are known to have complex and sluggish macroscopic dynamics. But, what are the atomic motions underlying such dynamics? Researchers from the US and Britain use state-of-the-art molecular-dynamics simulations to ``visualize,'' identify, and characterize the atomic motions.

Subfields: Materials Chemistry, Physical and Theoretical Chemistry

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Citations in the corpus

Revealing Hidden Structural Order Controlling Both Fast and Slow Glassy Dynamics in Supercooled Liquids (2018, background): “On the contrary, it was also proposed that the fast dynamics is localized and the slow dynamics develops as a result of dynamic facilitation, which is purely of dynamic origin [50].”
The role of local structure in dynamical arrest (2014, background): “Facilitation has been investigated in atomistic models [268], where similar behaviour to the kinetically constrained models has been found.”
Aspects of non-equilibrium in classical and quantum systems: Slow relaxation and glasses, dynamical large deviations, quantum non-ergodicity, and open quantum dynamics (2017, background): “)=To]2 +ln˝o, which in contrast to the traditional VFT form does not predict a nite temperature singularity. From Ref. [21]. (d) Pattern of spatial relaxation showing dynamic heterogeneity. From Ref. [22]. sense that it purports that the observed dynamics is a manifestation of underlying thermodynam”
Deformation and flow of amorphous solids: Insights from elastoplastic models (2017, background): “In quiescent systems rearrangements through string-like motion of particles seem to be more accessible (Keys et al., 2011), even though STs have also been claimed to be at the core of structural relaxation in deeply supercooled liquids (Lemâıtre, 2014).”
Fractons (2018, background): “This superexponential dependence of relaxation time on temperature is reminiscent of ‘almost many body localized’ systems [59, 60], and also of kinetically constrained models of classical glasses [61].”