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  • Title: Strong pressure-energy correlations in van der Waals liquids.
    Author: Pedersen UR, Bailey NP, Schrøder TB, Dyre JC.
    Journal: Phys Rev Lett; 2008 Jan 11; 100(1):015701. PubMed ID: 18232783.
    Abstract:
    Strong correlations between equilibrium fluctuations of the configurational parts of pressure and energy are found in computer simulations of the Lennard-Jones liquid and other simple liquids, but not for hydrogen-bonding liquids such as methanol and water. The correlations that are present also in the crystal and glass phases reflect an effective inverse power-law repulsive potential dominating fluctuations, even at zero and slightly negative pressure. In experimental data for supercritical argon, the correlations are found to be approximately 96%. Consequences for viscous liquid dynamics are discussed.
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