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Commentary

The insulator-metal transition in hydrogen

Isaac Silvera
PNAS July 20, 2010 107 (29) 12743-12744; https://doi.org/10.1073/pnas.1007947107
Isaac Silvera
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  • For correspondence: silvera@physics.harvard.edu

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  • Evidence for a first-order liquid-liquid transition in high-pressure hydrogen from ab initio simulations
    - Jun 21, 2010
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    Fig. 1.

    A possible phase diagram for hydrogen, showing the theoretical melting line and the plasma-phase transition line. At lower temperatures in the solid, three phases are observed: hexagonal close packed (HCP), the broken symmetry phase (BSP), and the hydrgrogen A phase (sometimes called I, II, and III). Hydrogen may be liquid-atomic metallic at very high pressure and T = 0 K, shown by the extrapolations (dotted lines). At even higher pressures, the atomic liquid would solidify. A single shock wave generates points on the primary Hugoniot, with very high temperatures but modest pressures; higher pressures and lower temperatures are achieved off-Hugoniot with a reverberating shock wave. The dash-dot line is an isochore.

References

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    (2010) Evidence for a first order liquid–liquid transition in high pressure hydrogen from ab-initio simulations. Proc Natl Acad Sci 107:12799–12803.
    OpenUrlAbstract/FREE Full Text
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    1. Scandolo S
    (2003) Liquid–liquid phase transition in compressed hydrogen from first-principles simulations. Proc Natl Acad Sci USA 100:3051–3053.
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    (1992) Fluid hydrogen at high density: Pressure ionization. Phys Rev A 46:2084–2100.
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    (2007) Phase transition in a strongly nonideal deuterium plasma generated by quasi-isentropical compression at megabar pressures. Phys Rev Lett 99:185001–185004.
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The insulator-metal transition in hydrogen
Isaac Silvera
Proceedings of the National Academy of Sciences Jul 2010, 107 (29) 12743-12744; DOI: 10.1073/pnas.1007947107

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The insulator-metal transition in hydrogen
Isaac Silvera
Proceedings of the National Academy of Sciences Jul 2010, 107 (29) 12743-12744; DOI: 10.1073/pnas.1007947107
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