Title: Microscopic Theory for the Role of Attractive Forces in the Dynamics of Supercooled Liquids

Journal Article · · Physical Review Letters
 [1];  [2]
  1. Univ. of Illinois, Urbana, IL (United States); University of Illinois
  2. Univ. of Illinois, Urbana, IL (United States)

We formulate a microscopic, no adjustable parameter, theory of activated relaxation in supercooled liquids directly in terms of the repulsive and attractive forces within the framework of pair correlations. Under isochoric conditions, attractive forces can nonperturbatively modify slow dynamics, but at high enough density their influence vanishes. Under isobaric conditions, attractive forces play a minor role. High temperature apparent Arrhenius behavior and density-temperature scaling are predicted. Furthermore, our results are consistent with recent isochoric simulations and isobaric experiments on a deeply supercooled molecular liquid. The approach can be generalized to treat colloidal gelation and glass melting, and other soft matter slow dynamics problems.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-07ER46471
OSTI ID:
1875671
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 115; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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