Electrical conductivity of nonideal hydrogen plasma at megabar dynamic pressures

Metal-Dielectric Transition in Hydrogen

“…The fraction of the proton subsystem in the total density of the metal is no less than 30-35% rather than 5% as was concluded by the authors of [4]. This value fully agrees with the experimental results reported in [5].…”

“…If the additional scattering of conduction electrons from hydrogen atoms is taken into account in the higher orders of perturbation theory, the electrical resistivity attains the experimental value at even higher densities of the proton subsystem. This theoretical conclusion agrees well with the experimental results of [5], where the fraction of ionized atoms was ≤ 40%.…”

“…To make the quantitative calculations performed in this study more certain, we use the values of these parameters obtained, e.g., in [4]. However, since the experimental studies of [5] are fairly comprehensive, we use some experimental results of this study for interpreting the theoretical results that we obtained. According to [4], molecular hydrogen in the liquid state was subjected to shock compression up to the pressures in the range 0.93-1.80 Mbar at the temperatures 2200-4400 K and densities 0.28-0.36 mol/cm 3 .…”

“…A qualitative breakthrough in the studies of metallic hydrogen occurred after a number of experiments on shock compression of both molecular hydrogen in the liquid state and hydrogen and deuterium plasma. Those experiments showed that electric conductivity increased steeply for certain combinations of density, pressure, and temperature [4][5][6][7][8][9]. Specific values of these parameters depended on the initial state of hydrogen (i.e., the state before compression).…”

Transition to a Virtually Incompressible Oxide Phase at a Shock Pressure of 120 GPa (1.2 Mbar):Gd3Ga5O12

“…The prototypical example is observation of minimum metallic conductivity (MMC) of dense fluid hydrogen at 140 GPa, nine-fold compression of liquid density, and 3000 K [1][2][3]. The high pressure and density and relatively low temperature are achieved by multiple-shock compression [2].…”