Strong pressure-energy correlations in van der Waals liquids.

  title={Strong pressure-energy correlations in van der Waals liquids.},
  author={Ulf R. Pedersen and Nicholas P. Bailey and Thomas B Schr\oder and Jeppe C Dyre},
  journal={Physical review letters},
  volume={100 1},
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… CONTINUE READING

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