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
DOI 10.1103/PhysRevB.105.L220502 · Physical Review B
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Abstract
We present detailed studies of the superconductivity in high-pressure H3S. X-ray diffraction measurements show that cubic Im3¯m H3S was synthesized from elemental sulfur and hydrogen donor ammonia borane (NH3BH3). Our electrical transport measurements confirm superconductivity with a transition temperature Tc=197K at 153GPa. 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| H3S Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 197 | 153 GPa | onset |
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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