Local Density Fluctuation Governs the Divergence of Viscosity Underlying Elastic and Hydrodynamic Anomalies in a 2D Glass-Forming Liquid

Hayato Shiba, Takeshi Kawasaki, Kang Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

If a liquid is cooled rapidly to form a glass, its structural relaxation becomes retarded, producing a drastic increase in viscosity. In two dimensions, strong long-wavelength fluctuations persist, even at low temperature, making it difficult to evaluate the microscopic structural relaxation time. This Letter shows that, in a 2D glass-forming liquid, relative displacement between neighbor particles yields a relaxation time that grows in proportion to the viscosity. In addition to thermal elastic vibrations, hydrodynamic fluctuations are found to affect the long-wavelength dynamics, yielding a logarithmically diverging diffusivity in the long-time limit.

Original languageEnglish
Article number265501
JournalPhysical review letters
Volume123
Issue number26
DOIs
Publication statusPublished - 2019 Dec 23

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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