Spatiotemporal intermittency and localized dynamic fluctuations upon approaching the glass transition

Autor:	Fris, J. Ariel Rodriguez, Weeks, Eric R., Sciortino, Francesco, Appignanesi, Gustavo A.
Rok vydání:	2018
Předmět:	Condensed Matter - Disordered Systems and Neural Networks Condensed Matter - Soft Condensed Matter
Zdroj:	Phys. Rev. E 97, 060601 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.97.060601
Popis:	We introduce a new and robust approach for characterizing spatially and temporally heterogeneous behavior within a system based on the evolution of dynamic fuctuations once averaged over different space lengths and time scales. We apply it to investigate the dynamics in two canonical systems as the glass transition is approached: simulated Lennard-Jones liquids and experimental dense colloidal suspensions. We find that in both cases the onset of glassines is marked by spatially localized dynamic fluctuations originating in regions of correlated mobile particles. By removing the trivial system size dependence of the fluctuations we show that such regions contain tens to hundreds of particles for time scales corresponding to maximally non-Gaussian dynamics. Comment: New analysis technique introduced, and applied to previously published data
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1801.09816 Zobrazit plný text záznamu View this record from Arxiv