Nonunitary Triplet Pairing in the Centrosymmetric Superconductor LaNiGa2

Hillier, Adrian D and Quintanilla, Jorge and Mazidian, Bayan and Annett, James F and Cywinski, Robert (2012) Nonunitary Triplet Pairing in the Centrosymmetric Superconductor LaNiGa2. Physical Review Letters, 109 (9). 0-0. ISSN 0031-9007. (Full text available)

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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.

Item Type: Article
Additional information: Article number: 097001
Subjects: Q Science
Q Science > QC Physics
Q Science > QC Physics > QC174.12 Quantum theory
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: Jorge Quintanilla
Date Deposited: 31 Aug 2012 13:05
Last Modified: 10 Oct 2012 15:19
Resource URI: http://kar.kent.ac.uk/id/eprint/30430 (The current URI for this page, for reference purposes)
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