Nonunitary Triplet Pairing in the Centrosymmetric Superconductor LaNiGa2

Hillier A.D., Quintanilla J., Bayan Mazidian, JF Annett, R Cywinski

Research output: Contribution to journalArticle (Academic Journal)

70 Citations (Scopus)

Abstract

Muon spin rotation and relaxation experiments on the centrosymmetric intermetallic superconductor LaNiGa2 are reported. The appearance of spontaneous magnetic fields coincides with the onset of superconductivity, implying that the superconducting state breaks time reversal symmetry, similarly to noncentrosymmetric LaNiC2. Only four triplet states are compatible with this observation, all of which are nonunitary triplets. This suggests that LaNiGa2 is the centrosymmetric analogue of LaNiC2.We argue that these materials are representatives of a new family of paramagnetic nonunitary superconductors.
Translated title of the contributionEvidence for non-unitary and time-reversal symmetry breaking in the centrosymmetric superconductor LaNiGa2
Original languageEnglish
Article number097001
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Volume109
Issue number9
Early online date27 Aug 2012
DOIs
Publication statusPublished - 31 Aug 2012

Keywords

  • superconductor

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