[Report] Observation of superconductivity in hydrogen sulfide from nuclear resonant scattering
High-temperature superconductivity remains a focus of experimental and theoretical research. Hydrogen sulfide (H2S) has been reported to be superconducting at high pressures and with a high transition temperature. We report on the direct observation of the expulsion of the magnetic field in H2S compressed to 153 gigapascals. A thin 119Sn film placed inside the H2S sample was used as a sensor of the magnetic field. The magnetic field on the 119Sn sensor was monitored by nuclear resonance scattering of synchrotron radiation. Our results demonstrate that an external static magnetic field of about 0.7 tesla is expelled from the volume of 119Sn foil as a result of the shielding by the H2S sample at temperatures between 4.7 K and approximately 140 K, revealing a superconducting state of H2S. Authors: Ivan Troyan, Alexander Gavriliuk, Rudolf Rüffer, Alexander Chumakov, Anna Mironovich, Igor Lyubutin, Dmitry Perekalin, Alexander P. Drozdov, Mikhail I. Eremets