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Structural precursor to freezing: An integral equation study
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DOI：10.1063/1.2889926.png)
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Abstract
En 中文
Recent simulation studies have drawn attention to the shoulder which forms in the second peak of the radial distribution function of hard spheres at densities close to freezing and which is associated with local crystalline ordering in the dense fluid. We address this structural precursor to freezing using an inhomogeneous integral equation theory capable of describing local packing constraints to a high level of accuracy. The addition of a short-range attractive interaction leads to a well known broadening of the fluid-solid coexistence region as a function of attraction strength. The appearance of a shoulder in our calculated radial distribution functions is found to be consistent with the broadened coexistence region for a simple model potential, thus demonstrating that the shoulder is not exclusively a high density packing effect. (c) 2008 American Institute of Physics.
Keywords:
RADIAL-DISTRIBUTION FUNCTION
PERCUS-YEVICK EQUATION
LENNARD-JONES FLUIDS
SPHERICALLY INHOMOGENEOUS FLUIDS
TRIPLET CORRELATION-FUNCTION
FUNDAMENTAL MEASURE-THEORY
LIQUID-VAPOR INTERFACE
HARD-SPHERE MIXTURES
CLASSICAL FLUIDS
BRIDGE FUNCTION
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3.1
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