BEGIN:VCALENDAR VERSION:2.0 PRODID:icalendar-ruby CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Europe/Vienna BEGIN:DAYLIGHT DTSTART:20260329T030000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST END:DAYLIGHT BEGIN:STANDARD DTSTART:20261025T020000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260424T040536Z UID:1776157200@ist.ac.at DTSTART:20260414T110000 DTEND:20260414T120000 DESCRIPTION:Speaker: Elena Hassinger\nhosted by Kimberly Modic\nAbstract: A bstract:Superconductors with non-trivial pairing symmetries expand our und erstanding of correlated quantum matter and show promise for applications in quantum computing. Odd-parity superconductivity is interesting in this regard due to its robustness to magnetic field and possible topological su rface states. The phenomenon only occurs in a few materials\, the most rec ognised cases of which are strongly correlated uranium-based systems with weak ferromagnetism. Another candidate is CeRh2As2\, which exhibits a magn etic-field-induced transition between two superconducting phases\, current ly understood as states of even- and odd-parity pairing. Here\, the odd-pa rity pairing is thought to be stabilisied not by ferromagnetism\, but by t he staggered Rashba spin-orbit interaction caused by the absence of invers ion symmetry at the Ce sites. Since the tetragonal crystal structure is ce ntrosymmetric\, states of distinct parity are allowed [1\,2]. But the supe rconductivity is not the only mystery of CeRh2As2. Similarly to other unco nventional superconductors\, the material hosts a coexisting weak ordered state that can be suppressed by pressure [3-5]. Although the order paramet er is not fully identified\, internal magnetic fields are evidenced by NMR /NQR [6] and muSR [7] measurements. Intriguingly\, the transition temperat ure decreases with the out-of-plane field\, but increases strongly with th e in-plane field\, which is hard to reconcile with a simple magnetic order but can be explained by considering quadrupolar degrees of freedom [3\,8] . This unconventional magnetic state and its role for superconductivity ar e currently in the focus of research on this compound. In my talk\, I will highlight experimental results from macroscopic and microscopic measureme nts under different tuning parameters such as pressure and magnetic field\ , each nurturing our current understanding of the fascinating properties o f CeRh2As2.  References [1] S. Khim & J. Landaeta et al.\, Science 373\ , 1012–1016 (2021). [2] J. Landaeta et al.\, Phys. Rev. X 12\, 031001 ( 2022). [3] D. Hafner et al.\, Phys. Rev. X 12\, 011023 (2022). [4] M. Pf eiffer et al.\, Phys. Rev. Lett. 133\, 126506 (2024). [5] K. Semeniuk et al.\, Phys. Rev. B 110\, L100504 (2024). [6] M. Kibune et al.\, Phys. Rev . Lett. 128\, 057002 (2022).[7] S. Khim et al.\, Phys. Rev. B 111\, 11513 4 (2025).[8] B. Schmidt and P. Thalmeier\, Phys. Rev. B 110\, 075154 (202 4).  LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101 )\, ISTA ORGANIZER:Stephanie.Dolot@ist.ac.at SUMMARY:Elena Hassinger: Mysteries of the two-phase superconductor CeRh2As2 URL:https://talks-calendar.ista.ac.at/events/6209 END:VEVENT END:VCALENDAR