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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/39366


    Title: STRUCTURE AND THERMODYNAMICS OF LIQUID ALKALI-METALS IN VARIATIONAL MODIFIED HYPERNETTED-CHAIN THEORY
    Authors: CHEN,HC;LAI,SK
    Contributors: 物理研究所
    Keywords: ONE-COMPONENT-PLASMA;DENSE IONIZED MATTER;HARD-SPHERE;REFERENCE SYSTEMS;FREE-ENERGY;STATISTICAL-MECHANICS;PERTURBATION-THEORY;INTEGRAL-EQUATIONS;APPROXIMATION;ALLOYS
    Date: 1992
    Issue Date: 2010-07-08 14:13:34 (UTC+8)
    Publisher: 中央大學
    Abstract: The role of the Percus-Yevick hard-sphere bridge function in the modified hypernetted-chain integral equation is examined within the context of Lado's criterion [F. Lado, S. M. Foiles, and N. W. Ashcroft, Phys. Rev. A 28, 2374 (1983)]. It is found that the commonly used Lado's criterion, which takes advantage of the analytical simplicity of the Percus-Yevick hard-sphere bridge function, is inadequate for determining an accurate static pair-correlation function. Following Rosenfeld [Y. Rosenfeld, Phys. Rev. A 29, 2877 (1984)], we reconsider Lado's criterion in the so-called variational modified hypernetted-chain theory. The main idea is to construct a free-energy functional satisfying the virial-energy thermodynamic self-consistency. It turns out that the widely used Gibbs-Bogoliubov inequality is equivalent to this integral approach of Lado's criterion. Detailed comparison between the presently obtained structural and thermodynamic quantities for liquid alkali metals and those calculated also in the modified hypernetted-chain theory but with the one-component-plasma reference system leads us to a better understanding of the universality property of the bridge function.
    Relation: PHYSICAL REVIEW A
    Appears in Collections:[物理研究所] 期刊論文

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