Observation of the Wigner-Huntington Transition to Solid Metallic Hydrogen

Title	Observation of the Wigner-Huntington Transition to Solid Metallic Hydrogen
Authors	Ranga Dias, Isaac F. Silvera
Magazine	ArXiV
Date	10/05/2016
Introduction	Research was conducted on solid hydrogen subjected to high pressure at low temperatures. As pressure increased, the sample underwent a transformation from a transparent state to black, ultimately becoming a reflective metal, a phase investigated at 495 GPa. Reflectance measurements in the visible spectrum indicated values up to 0.90 for the metallic hydrogen. A Drude free electron model was applied to the reflectance data, yielding a plasma frequency of 30.1 eV at 5.5 K and an electron carrier density of 6.7x10^23 particles/cm^3, which aligns with theoretical predictions. These characteristics confirm the material's metallic nature, affirming the laboratory creation of solid metallic hydrogen.
Quote	Dias, R.; Silvera, I. F. Observation of the Wigner-Huntington Transition to Solid Metallic Hydrogen. arXiv preprint arXiv:1610.01634 (2016).
Element	Hydrogen (H)
Industry	Research & Laboratory

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