Thermodynamic behaviour of supercritical matter.

@article{Bolmatov2013ThermodynamicBO,
  title={Thermodynamic behaviour of supercritical matter.},
  author={Dima Bolmatov and Vadim V. Brazhkin and Kostya Trachenko},
  journal={Nature communications},
  year={2013},
  volume={4},
  pages={
          2331
        }
}
Since their discovery in 1822, supercritical fluids have been of enduring interest and have started to be deployed in many important applications. Theoretical understanding of the supercritical state is lacking and is seen to limit further industrial deployment. Here we study thermodynamic properties of the supercritical state and discover that specific heat shows a crossover between two different regimes, an unexpected result in view of currently perceived homogeneity of supercritical state in… 
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Direct evidence is presented for propagating solid-like longitudinal phonon-like excitations with wavelengths extending to interatomic separations deep in the supercritical state at temperatures up to 3,300 times the critical temperature.
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