Field-induced transition from even to odd parity superconductivity in CeRh$_2$As$_2$

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

doi:10.1126/science.abe7518

paper

Field-induced transition from even to odd parity superconductivity in CeRh $_{2}$ As $_{2}$

arXiv:2101.09522 · doi:10.1126/science.abe7518

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.

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Field-induced transition from even to odd parity superconductivity in CeRh2​As2​

Abstract

References in corpus (26)

Cited by in corpus (92)

Field-induced transition from even to odd parity superconductivity in CeRh $_{2}$ As $_{2}$