Correlation Functions Characterized by the Physical Cluster Formation due to Attractive Forces(Condensed Matter : Structure, Mechanical and Thermal Properties)

概要

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Two kinds of correlation functions called the pair connectedness and the pair disconnectedness cancontribute to explaining the thermodynamic behavior of a fluid including physical clusters characterized as ensembles of particles trapping each other by attractive forces. An integral equation satisfied by the pair connectedness and another integral equation satisfied by the pair disconnectedness form an integral equation system equivalent to the Ornstein-Zernike. It is possible analytically to estimate the pair connectedness relevant to physical clusters which are formed with attractive forces even due to both an extremely short-ranged potential and a potential having a long tail since the integral equation satisfied by the pair connectedness has the same mathematical structure as the Ornstein Zernike. The behavior of the pair connectedness and the behavior of the pair disconnectedness demonstrate that a situation where particles having high kinetic abilities are firmly confined by branches of physical clusters resulting in the percolation contributes to making the first order phase transition at least at the triple point occur.
社団法人日本物理学会の論文
2005-04-15