The electrical resistivity of liquid hydrogen has been measured at the high\ndynamic pressures, densities and temperatures that can be achieved with a\nreverberating shock wave. The resulting data are most naturally interpreted in\nterms of a continuous transition from a semiconducting to a metallic, largely\ndiatomic fluid, the latter at 140 GPa, (ninefold compression) and 3000 K. While\nthe fluid at these conditions resembles common liquid metals by the scale of\nits resistivity of 500 micro-ohm-cm, it differs by retaining a strong pairing\ncharacter, and the precise mechanism by which a metallic state might be\nattained is still a matter of debate. Some evident possibilities include (i)\nphysics of a largely one-body character, such as a band-overlap transition,\n(ii) physics of a strong-coupling or many-body character,such as a Mott-Hubbard\ntransition, and (iii) processes in which structural changes are paramount.\n
Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of orders of magnitude, and are widely observed in condensed-matter systems. This article...
Abstract We describe the first principle‐based electron force field (eFF) methodology for modeling the simultaneous dynamics of electrons and nuclei (eMD) evolving nonadiabatica...
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