2019
DOI: 10.1103/physrevb.100.184505 View full text |Buy / Rent full text
Has correction 2021-9-13
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Abstract: The 2014-2015 prediction, discovery, and confirmation of record high temperature superconductivity above 200K in compressed H3S, followed by the 2018 extension to superconductivity in the 250-260K range in lanthanum hydride, marks a new era in the longstanding quest for room temperature superconductivity: quest achieved, at the cost of supplying 1.5-2 megabars pressure. Predictions of numerous high temperature superconducting metal hydrides XHn (X=metal atom) have appeared, but are providing limited understand… Show more

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“…Calculations of T C in [5,6], reaching as high as 286 -288 K, bear close correspondence to experimental evidence of onset superconductivity at high temperatures in [13,29]. Combined with subsequent theoretical results in [22][23][24][25][26], phonon mechanisms seemingly appear capable of addressing the full experimental ranges in T C and P reported in [12,13], given that the body of wide-ranging theoretical results overlap available data, as illustrated in Section A1 ( Figs. 3-4).…”
Section: Coexisting Phonon/coulomb Interactions -Lah 10supporting
“…Available experimental data on LaH 10 and YH 9 samples contain persuasive evidence of unconventional high-T C superconductivity in these compounds, including a maximum in T C (P) [12,14], suggesting optimization, and a linear temperature dependence in the normalstate resistance [30], which places upper bounds on the electron-phonon coupling strength, owing to the absence of resistance saturation [43]. Although theory based on phonon mediation notably predicted superconductivity at high temperatures [5,6], convergence of broad ranges in calculated T C to experimental values is hampered by theoretical pressure dependences [5,[24][25][26] that are contrary to experiment [29], thus necessitating an alternate approach.…”
Section: Resultsmentioning
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