Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity: Poster Session
TT 30.7: Poster
Donnerstag, 8. September 2022, 15:00–18:00, P1
Time-reversal symmetry breaking in the superconducting state of ScS — •Arushi Arushi1,2, Roshan Kumar Kushwaha1, Deepak Singh3, Adrian Hillier3, Mathias S Scheurer4, and Ravi Prakash Singh1 — 1Indian Institute of Science Education and Research Bhopal, Bhopal, India — 2Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 3ISIS Facility, STFC Rutherford Appleton Laboratory, Didcot, United Kingdom — 4Institute for Theoretical Physics, University of Innsbruck, Innsbruck, Austria
The study of unconventional superconductors, which go beyond the BCS theory, is a crucial pillar of modern condensed-matter research and it is driven by the potential of these superconductors for applications and by fundamental scientific question, such as understanding their pairing mechanism. For the latter, time reversal-symmetry-breaking superconductivity might be particularly interesting since it is rare in nature and the underlying pairing mechanism must involve more than the conventional electron-phonon coupling. In this regard, we studied the superconducting state of ScS(rocksalt structure) using macroscopic and microscopic measurements such as muon spin rotation/relaxation(μSR). All the performed measurements confirmed the bulk superconductivity at 5.1(1) K. Specific heat together with transverse-field μSR measurements indicate a full gap, while our zero-field μSR study reveals the presence of spontaneous static or quasi-static magnetic fields emerging when entering the superconducting state. We discuss various theoretical possibilities of pairing mechanisms, hint towards an unconventional superconducting state in ScS.