Field-induced transition within the superconducting state of CeRh2As2

S Khim, J F Landaeta, J Banda, N Bannor, M Brando, P M R Brydon, D Hafner, R Küchler, R Cardoso-Gil, U Stockert, A P Mackenzie, D F Agterberg, C Geibel, E Hassinger*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

Materials with multiple superconducting phases are rare. Here, we report the discovery of two-phase unconventional superconductivity in CeRh2As2 Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 tesla, even though the transition temperature is only 0.26 kelvin. Furthermore, a transition between two different superconducting phases is observed in a c axis magnetic field. Local inversion-symmetry breaking at the cerium sites enables Rashba spin-orbit coupling alternating between the cerium sublayers. The staggered Rashba coupling introduces a layer degree of freedom to which the field-induced transition and high critical field seen in experiment are likely related.
Original languageEnglish
Pages (from-to)1012-1016
Number of pages5
JournalScience
Volume373
Issue number6558
DOIs
Publication statusPublished - 26 Aug 2021

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