Observation of superconductivity in hydrogen sulfide from nuclear resonant scattering
Ivan Troyan1, Alexander Gavriliuk2, Rudolf Rüffer3
1Max-Planck-Institut für Chemie, 55020 Mainz, Germany. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow 119333, Russia. itrojan64@gmail.com.
Abstract:
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 (119)Sn film placed inside the H2S sample was used as a sensor of the magnetic field. The magnetic field on the (119)Sn 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 (119)Sn 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.
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