Superconductivity in chromium nitrides Pr₃Cr_10-xN₁₁ with strong electron correlations.

ABSTRACT: Exploration of superconductivity in Cr-based compounds has attracted considerable interest because only a few Cr-based superconductors (CrAs, A₂Cr₃As₃ and ACr₃As₃ (A = K, Rb, Cs, Na)) have been discovered so far and they show an unconventional pairing mechanism. We report the discovery of bulk superconductivity at 5.25 K in chromium nitride in Pr₃Cr_10-xN₁₁ with a cubic lattice structure. A relatively large upper critical field of H _c2(0) ∼ 12.6 T is determined, which is larger than the estimated Pauli-paramagnetic pair-breaking magnetic field. The material has a large electronic specific-heat coefficient of 170 mJ K^-2 mol^-1-about 10 times larger than that estimate

SUBMITTER: Wu W 

PROVIDER: S-EPMC8288919 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature