Ghosh, Sudeep K., Annett, James F., Quintanilla, Jorge (2021) Time-reversal symmetry breaking in superconductors through loop supercurrent order. New Journal of Physics, 23 . Article Number 083018. ISSN 1367-2630. (doi:10.1088/1367-2630/ac17ba) (KAR id:69551)
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Official URL: https://doi.org/10.1088/1367-2630/ac17ba |
Abstract
We propose a novel superconducting ground state where microscopic supercurrent loops form spontaneously within a unit cell at the superconducting transition temperature with only uniform, onsite and intra-orbital singlet pairing. As a result of the circulating currents time-reversal symmetry (TRS) is spontaneously broken in the superconducting state. Using Ginzburg–Landau theory we describe in detail how these currents emerge in a toy model. We discuss the crystallographic symmetry requirements more generally to realize such a state and show that they are met by the Re6X (X = Zr, Hf, Ti) family of TRS-breaking, but otherwise seemingly conventional, superconductors. We estimate an upper bound for the resulting internal magnetic fields and find it to be consistent with recent muon-spin relaxation experiments.
Item Type: | Article |
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DOI/Identification number: | 10.1088/1367-2630/ac17ba |
Uncontrolled keywords: | Physics of Quantum Materials |
Subjects: |
Q Science > QC Physics > QC173.45 Condensed Matter Q Science Q Science > QC Physics |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Funders: |
Engineering and Physical Sciences Research Council (https://ror.org/0439y7842)
Leverhulme Trust (https://ror.org/012mzw131) |
Depositing User: | Jorge Quintanilla Tizon |
Date Deposited: | 13 Oct 2018 23:50 UTC |
Last Modified: | 04 Mar 2024 19:11 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/69551 (The current URI for this page, for reference purposes) |
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