Abstract:
:The discovery of superconductivity at 260 K in hydrogen-rich compounds like LaH10 re-invigorated the quest for room temperature superconductivity. Here, we report the temperature dependence of the upper critical fields μ0Hc2(T) of superconducting H3S under a record-high combination of applied pressures up to 160 GPa and fields up to 65 T. We find that Hc2(T) displays a linear dependence on temperature over an extended range as found in multigap or in strongly-coupled superconductors, thus deviating from conventional Werthamer, Helfand, and Hohenberg (WHH) formalism. The best fit of Hc2(T) to the WHH formalism yields negligible values for the Maki parameter α and the spin-orbit scattering constant λSO. However, Hc2(T) is well-described by a model based on strong coupling superconductivity with a coupling constant λ ~ 2. We conclude that H3S behaves as a strong-coupled orbital-limited superconductor over the entire range of temperatures and fields used for our measurements.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Mozaffari S,Sun D,Minkov VS,Drozdov AP,Knyazev D,Betts JB,Einaga M,Shimizu K,Eremets MI,Balicas L,Balakirev FFdoi
10.1038/s41467-019-10552-ysubject
Has Abstractpub_date
2019-06-07 00:00:00pages
2522issue
1issn
2041-1723pii
10.1038/s41467-019-10552-yjournal_volume
10pub_type
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