IFIMAC+ICMM Joint Seminar Series focuses on cutting-edge research on condensed matter physics, bringing speakers from all over the world to our Cantoblanco Campus. All talks are streamed online. Some of them will be celebrated on campus and onsite participation will also be possible. You need to subscribe to our mailing list at the link provided below to get the links to the seminar room. https://listas-correo.uam.es/sympa/subscribe/seminarios-ifimac-icmm-l

Field-induced transition from even to odd parity superconductivity in CeRh2As2

Elena Hassinger, Max Planck Institute of Chemical Physics of Solids, Dresden (Germany), January 27th, 2022, 12:00 CET

I will report on the discovery of unconventional superconductivity in CeRh2As2. Although it appears at temperatures below 1 K, the superconducting state is extremely robust under the application of magnetic fields and presents a unique phase diagram. Most interestingly, a field-induced phase transition within the superconducting state appears for c-axis fields in magnetisation, susceptibility and magnetostriction indicating two separate superconducting states. The phase diagram can be understood by taking into account the staggered spin-orbit coupling at the Ce position. In that picture, the magnetic field drives a transition from even to odd parity superconductivity. The angle dependence of the critical fields strongly reinforces this interpretation.