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Mentor note: Two threads got merged, the first nine posts are a mixture of two original threads.
http://science.sciencemag.org/content/early/2017/01/25/science.aal1579
The rest is behind a pay wall.
From the abstract alone it is somewhat unclear whether or not this metallic hydrogen remains (meta)stable when the pressure is removed.
http://science.sciencemag.org/content/early/2017/01/25/science.aal1579
Abstract said:Producing metallic hydrogen has been a great challenge to condensed matter physics. Metallic hydrogen may be a room temperature superconductor and metastable when the pressure is released and could have an important impact on energy and rocketry. We have studied solid molecular hydrogen under pressure at low temperatures. At a pressure of 495 GPa hydrogen becomes metallic with reflectivity as high as 0.91. We fit the reflectance using a Drude free electron model to determine the plasma frequency of 32.5 ± 2.1 eV at T = 5.5 K, with a corresponding electron carrier density of 7.7 ± 1.1 × 10^23 particles/cm^3, consistent with theoretical estimates of the atomic density. The properties are those of an atomic metal. We have produced the Wigner-Huntington dissociative transition to atomic metallic hydrogen in the laboratory.
The rest is behind a pay wall.
From the abstract alone it is somewhat unclear whether or not this metallic hydrogen remains (meta)stable when the pressure is removed.
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