Enhanced diffusivity in supercooled liquids

Ranko Richert, K. Samwer

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The enhancement of self and probe diffusivity over the Stokes-Einstein values by orders of magnitude is observed in the viscous regime of polymers, molecular glass-formers and supercooled metallic systems. We investigate an alternative to identifying enhanced diffusivity with the fast components of the primary structural relaxation process: high translational mobility is being associated with cooperative dynamics in string-like topologies, which is responsible for fast diffusive particle motion and the slow secondary y-relaxation observed below the dynamic crossover temperature in fragile glassformers. This approach provides a unifying view of diffusivity across the different classes of glass-forming materials.

Original languageEnglish (US)
Article number36
JournalNew Journal of Physics
Volume9
DOIs
StatePublished - Feb 23 2007

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diffusivity
liquids
glass
particle motion
crossovers
strings
topology
augmentation
probes
polymers
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Enhanced diffusivity in supercooled liquids. / Richert, Ranko; Samwer, K.

In: New Journal of Physics, Vol. 9, 36, 23.02.2007.

Research output: Contribution to journalArticle

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