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Field-induced transition from even to odd parity superconductivity in CeRh$_2$As$_2$
- Source :
- Science 373, 1012 (2021)
- Publication Year :
- 2021
-
Abstract
- We report the discovery of two-phase unconventional superconductivity in CeRh$_2$As$_2$. Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 T, remarkable in a material whose transition temperature is 0.26 K. Furthermore, a $c$-axis field drives a transition between two different superconducting phases. In spite of the fact that CeRh$_2$As$_2$ is globally centrosymmetric, we show that local inversion-symmetry breaking at the Ce sites enables Rashba spin-orbit coupling to play a key role in the underlying physics. More detailed analysis identifies the transition from the low- to high-field states to be associated with one between states of even and odd parity.
Details
- Database :
- arXiv
- Journal :
- Science 373, 1012 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2101.09522
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1126/science.abe7518