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Insulator-metal transition in dense fluid deuterium

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Science  17 Aug 2018:
Vol. 361, Issue 6403, pp. 677-682
DOI: 10.1126/science.aat0970

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  • RE: Comments on “Insulator-metal transition in dense fluid deuterium”
    • Vladimir Fortov, Physiсist, Joint Institute for High Temperatures of Russian Academy of Science, Moscow, Russia
    • Other Contributors:
      • Victor Mintsev, Physiсist, Institute of Problems of Chemical Physics of Russian Academy of Science, Chernogolovka, Russia

    Celliers and his colleagues have published in the research report (Science, 17 August, 2018) experimental results on optical measurements of dynamically compressed fluid Deuterium up to 600 GPa. Unfortunately among 57 references in the article and 108 references in Supplementary materials we did not find references on the pioneering works in this field, where the problems of insulator to metal transition are discussed and direct measurements of high level conductivity were performed.
    For the first time about possibility of a first order insulator-metal transition and its connection with the liquid-gas transition was discussed in the work Landau-Zeldovich in 1943. Theoretical models of nonideal plasma (W.Ebeling, et al., 1991) predicted existence of such transition at megabar pressure. High level of hydrogen conductivity ~104 S/cm were measured in the dynamical experiments (P.S.Hawke, et al., 1978; A.I.Pavlovskiy, et al. 1987; S. T. Weir, et al, 1996; Fortov, et al, 1999, 2003) with the use of the shock reverberation technique.
    Measurements of thermodynamical parameters in the work Fortov, et al, (Phys. Rev. Lett. 2007) in the experiments on quasi-isentropical compression of Deuterium have shown 20% increase in density at megabar pressures, which is direct indication on the presence of phase transition of the first order. Also in this paper it was shown that the density of deuterium of ~1.4 g/cc is correspondent to the appearance of the measured high level (meta...

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    Competing Interests: None declared.