Unconventional superconductivity in Cr-based compound Pr3Cr10−x N11

Autor: C. S. Chen, Q. Wu, M. Y. Zou, Z. H. Zhu, Y. X. Yang, C. Tan, A. D. Hillier, J. Chang, J. L. Luo, W. Wu, L. Shu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: npj Quantum Materials, Vol 9, Iss 1, Pp 1-8 (2024)
Druh dokumentu: article
ISSN: 2397-4648
DOI: 10.1038/s41535-024-00634-6
Popis: Abstract We report results of specific heat and muon spin relaxation (μSR) measurements on a polycrystalline sample of Pr3Cr10−x N11, which shows superconducting state below T c = 5.25 K, a large upper critical field H c2 ~ 20 T and a residual Sommerfeld coefficient γ 0. The field dependence of γ 0(H) resembles γ of the U-based superconductors UTe2 and URhGe at low temperatures. The temperature-dependent superfluid density measured by transverse-field μSR experiments is consistent with a p-wave pairing symmetry. ZF-μSR experiment suggests a time-reversal symmetry broken superconducting transition, and temperature-independent spin fluctuations at low temperatures are revealed by LF-μSR experiments. These results indicate that Pr3Cr10−x N11 is a candidate of p-wave superconductor which breaks time-reversal symmetry.
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