Comment on: Observation of the Wigner-Huntington transition to metallic hydrogen

Florent Occelli; Paul Dumas; Paul Loubeyre

arxiv: 1702.07192 · v1 · pith:WIGGEJCPnew · submitted 2017-02-23 · ❄️ cond-mat.other · cond-mat.mtrl-sci

Comment on: Observation of the Wigner-Huntington transition to metallic hydrogen

Paul Loubeyre , Florent Occelli , Paul Dumas This is my paper

classification ❄️ cond-mat.other cond-mat.mtrl-sci

keywords commenthydrogenmetallicpressureanalysisarticlebelowcharacterization

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In a recently published article [1], Ranga P. Dias & Isaac F. Silvera have reported the visual evidence of metallic hydrogen concomitantly with its characterization at a pressure of 495 GPa and low temperatures. We have expressed serious doubts of such a conclusion when interviewed to comment on this publication [2,3]. In the following comment, we would like to detail the reasons, based on experimental evidences obtained by us and by other groups worldwide that sustain our skepticism. We have identified two main flaws in this paper, as discussed in details below: the pressure is largely overestimated; the origin of the sample reflectivity and the analysis of the reflectance can be seriously questioned.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Comment on: Observation of a first order phase transition to metal hydrogen near 425 GPa
cond-mat.other 2019-07 unverdicted novelty 1.0

Comment asserts that claimed metallic hydrogen at 425 GPa provides no new evidence of the insulator-metal transition and prior studies already reported comparable results.