Evidence for Time-Reversal Symmetry Breaking in the Noncentrosymmetric Superconductor LaNiC2

Hillier, Adrian D and Quintanilla, Jorge and Cywinski, Robert (2009) Evidence for Time-Reversal Symmetry Breaking in the Noncentrosymmetric Superconductor LaNiC2. Physical Review Letters: Moving Physics Forward, 102 (11). 117007 -1. ISSN 0031-9007. (Full text available)

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http://dx.doi.org/10.1103/PhysRevLett.102.117007

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.

Item Type: Article
Additional information: See also erratum: Phys. Rev. Lett. 105, 229901 (2010).
Subjects: Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: Jorge Quintanilla
Date Deposited: 03 Dec 2010 11:37
Last Modified: 30 Jun 2014 14:12
Resource URI: http://kar.kent.ac.uk/id/eprint/26087 (The current URI for this page, for reference purposes)

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