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 language | English |
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Article number | L220502 |
Journal | Physical Review B |
Volume | 105 |
Issue number | 22 |
DOIs | |
Publication status | Published - 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.
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- PetrologyGroup
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