Ghosh, Sudeep Kumar, Csire, Gábor, Whittlesea, Philip, Annett, James F, Gradhand, Martin, Quintanilla, Jorge (2020) Quantitative theory of triplet pairing in the unconventional superconductor LaNiGa2. Physical Review B: Condensed Matter and Materials Physics, . ISSN 0163-1829. (doi:10.1103/PhysRevB.101.100506) (KAR id:80669)
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Official URL: https://link.aps.org/doi/10.1103/PhysRevB.101.1005... |
Abstract
The exceptionally low-symmetry crystal structures of the time-reversal symmetry-breaking superconductors LaNiC2 and LaNiGa2 lead to an internally antisymmetric nonunitary triplet state as the only possibility compatible with experiments. We argue that this state has a distinct signature: a double-peak structure in the density of states (DOS) which resolves in the spin channel in a particular way. We construct a detailed model of LaNiGa2 capturing its electronic band structure and magnetic properties ab initio. The pairing mechanism is described via a single adjustable parameter. The latter is fixed by the critical temperature Tc allowing parameter-free predictions. We compute the electronic specific heat and find excellent agreement with experiment. The size of the ordered moment in the superconducting state is compatible with zero-field muon spin relaxation experiments and the predicted spin-resolved DOS suggests the spin splitting is within the reach of present experimental technology.
Item Type: | Article |
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DOI/Identification number: | 10.1103/PhysRevB.101.100506 |
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: | 31 Mar 2020 08:14 UTC |
Last Modified: | 08 Dec 2022 21:36 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/80669 (The current URI for this page, for reference purposes) |
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