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Title: Superconducting phase diagram of H3S under high magnetic fields

Journal Article · · Nature Communications

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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Florida State Univ., Tallahassee, FL (United States); Osaka Univ., Toyonaka (Japan)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
89233218CNA000001; SC0002613; DMR-1644779; 26000006
OSTI ID:
1542848
Alternate ID(s):
OSTI ID: 1594446
Report Number(s):
LA-UR-19-20960
Journal Information:
Nature Communications, Vol. 10; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 46 works
Citation information provided by
Web of Science

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Cited By (2)

Classifying hydrogen-rich superconductors journal August 2019
Classifying Induced Superconductivity in Atomically Thin Dirac-Cone Materials journal September 2019

Figures / Tables (5)


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