Biswas, P.K., Ghosh, S.K., Zhao, J.Z., Mayoh, D.A., Zhigadlo, N.D., Xu, Xiaofeng, Baines, C., Hillier, A.D., Balakrishnan, G., Lees, M.R. and others. (2021) Chiral singlet superconductivity in the weakly correlated metal LaPt3P. Nature Communications, 12 . Article Number 2504. E-ISSN 2041-1723. (doi:10.1038/s41467-021-22807-8) (KAR id:88011)
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Official URL: https://doi.org/10.1038/s41467-021-22807-8 |
Abstract
Chiral superconductors are novel topological materials with finite angular momentum Cooper pairs circulating around a unique chiral axis, thereby spontaneously breaking time-reversal symmetry. They are rather scarce and usually feature triplet pairing: a canonical example is the chiral p-wave state realized in the A-phase of superfluid He3. Chiral triplet superconductors are, however, topologically fragile with the corresponding gapless boundary modes only weakly protected against symmetry-preserving perturbations in contrast to their singlet counterparts. Using muon spin relaxation measurements, here we report that the weakly correlated pnictide compound LaPt3P has the two key features of a chiral superconductor: spontaneous magnetic fields inside the superconducting state indicating broken time-reversal symmetry and low temperature linear behaviour in the superfluid density indicating line nodes in the order parameter. Using symmetry analysis, first principles band structure calculation and mean-field theory, we unambiguously establish that the superconducting ground state of LaPt3P is a chiral d-wave singlet.
Item Type: | Article |
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DOI/Identification number: | 10.1038/s41467-021-22807-8 |
Uncontrolled keywords: | Physics of Quantum Materials |
Subjects: | Q Science > QC Physics > QC173.45 Condensed Matter |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | Sudeep Kumar Ghosh |
Date Deposited: | 10 May 2021 05:39 UTC |
Last Modified: | 14 Nov 2022 23:12 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/88011 (The current URI for this page, for reference purposes) |
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