Test of the Stokes-Einstein Relation in a Two-Dimensional Yukawa Liquid

Journal Article · Fri Jan 13 00:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.015005· OSTI ID:20775020

Bin, Liu; Goree, J; Vaulina, O S ^[1]

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1. Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242 (United States)

The Stokes-Einstein relation, relating the diffusion and viscosity coefficients D and {eta}, is tested in two dimensions. An equilibrium molecular-dynamics simulation was used with a Yukawa pair potential. Regimes are identified where motion is diffusive and D is meaningful. The Stokes-Einstein relation, D{eta}{proportional_to}k{sub B}T, was found to be violated near the disordering transition; under these conditions collective particle motion exhibits dynamical heterogeneity. At slightly higher temperatures, however, the Stokes-Einstein relation is valid. These results may be testable in strongly coupled dusty plasma experiments.

• OSTI ID: 20775020
• Journal Information: Physical Review Letters, Vol. 96, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.96.015005; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIFFUSION
EQUILIBRIUM
LIQUIDS
MOLECULAR DYNAMICS METHOD
PARTICLES
PLASMA
PLASMA SIMULATION
POTENTIAL ENERGY
TWO-DIMENSIONAL CALCULATIONS
VISCOSITY
YUKAWA POTENTIAL