Nonperturbative effect of attractive forces in viscous liquids.

We study the role of the attractive intermolecular forces in the viscous regime of a simple glass-forming liquid by using computer simulations. To this end, we compare the structure and the dynamics of a standard Lennard-Jones glass-forming liquid model with and without the attractive tail of the interaction potentials. The viscous slowing down of the two systems is found to be quantitatively and qualitatively different over a broad density range, whereas the static pair correlations remain close. The common assumption that the behavior of dense nonassociated liquids is determined by the short-ranged repulsive part of the intermolecular potentials dramatically breaks down for the relaxation in the viscous liquid regime.

• Publication year

  2009

• Venue

  Physical Review Letters

• Publication date

  2009-07-14

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.103.170601arXiv 0907.2343PMID 19905741
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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