Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC</sub>2</sub>

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Persistent URL	http://purl.org/net/epubs/work/49669
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Record Id	49669
Title	Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC2
Contributors	AD Hillier (STFC Rutherford Appleton Lab.), J Quintanilla (STFC Rutherford Appleton Lab.), R Cywinski (Huddersfield U.)
Abstract	Muon spin relaxation experiments on the noncentrosymmetric intermetallic superconductor LaNiC2 are reported. We find that the onset of superconductivity coincides with the appearance of spontaneous magnetic fields, implying that in the superconducting state time-reversal symmetry is broken. An analysis of the possible pairing symmetries suggests only four triplet states compatible with this observation, all of them nonunitary. They include the intriguing possibility of triplet pairing with the full point group symmetry of the crystal, which is possible only in a noncentrosymmetric superconductor.
Organisation	ISIS , ISIS-MuSR , ISIS-THEORY , STFC
Keywords	Physics , 74.20.Rp , 76.75.+i , 74.70.Dd
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev Lett 102, no. 11 (2009): 117007.	doi:10.1103/PhysRevLett.102.117007	2009-Hillier-Quintanilla-Cywinski.pdf	2009