Clean-limit superconductivity in Im3¯m H3S synthesized from sulfur and hydrogen donor ammonia borane

Israel Osmond, Owen Moulding, Sam Cross, Takaki Muramatsu, Annabelle Brooks, Oliver Lord, Timofey Fedotenko, Jonathan Buhot, Sven Friedemann

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Abstract

We present detailed studies of the superconductivity in high-pressure . X-ray diffraction measurements show that cubic was synthesized from elemental sulfur and hydrogen donor ammonia borane (). Our electrical transport measurements confirm superconductivity with a transition temperature at . From the analysis of both the normal-state resistivity and the slope of the critical field, we conclude that the superconductivity is described by clean-limit behavior. A significant broadening of the resistive transition in finite magnetic field is found, as expected for superconductors. We identify a linear temperature-over-field scaling of the resistance at the superconducting transition which is not described by existing theories.
Original languageEnglish
Article numberL220502
JournalPhysical Review B
Volume105
Issue number22
DOIs
Publication statusPublished - 6 Jun 2022

Bibliographical note

Funding Information:
The authors thank Antony Carrington for valuable discussions. This work was partially supported by the EPSRC under Grants No. EP/V048759/1 and No. EP/L015544/1, as well as the ERC Horizon 2020 programme under Grant No. 715262-HPSuper. O.L. acknowledges support from the Royal Society in the form of a University Research Fellowship (UF150057). We acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III and we thank Hanns-Peter Liermann for assistance in using P02.2. Beamtime was allocated for Proposal No. I-20210376 EC.

Publisher Copyright:
© 2022 American Physical Society.

Research Groups and Themes

  • PetrologyGroup
  • PetrologyLabs

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