Fractional $1/3$ quantum vortices in chiral $d+id$ kagome superconductors
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910026994548736 |
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| author | Philipsen, Frederik A. S. Barkman, Mats Kreisel, Andreas Andersen, Brian M. |
| author_facet | Philipsen, Frederik A. S. Barkman, Mats Kreisel, Andreas Andersen, Brian M. |
| contents | We perform a theoretical investigation of the nature of vortices in chiral $d+id$ superconductors on the kagome lattice. The study is motivated by recent experimental developments reporting evidence of time-reversal symmetry breaking in the superconducting state of kagome metals. Using self-consistent microscopic calculations that incorporate the characteristics of the band structure of the kagome lattice, we find that fractional vortices permeate the ground state condensate in the presence of an external field. Each fractional vortex carries one third of the superconducting flux quantum and exhibits a characteristic signature related to one of the three sublattice degrees of freedom of the kagome lattice. We discuss the relevance of these results to recent experimental studies of kagome superconductors in the presence of an external magnetic field. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2602_17399 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fractional $1/3$ quantum vortices in chiral $d+id$ kagome superconductors Philipsen, Frederik A. S. Barkman, Mats Kreisel, Andreas Andersen, Brian M. Superconductivity Strongly Correlated Electrons We perform a theoretical investigation of the nature of vortices in chiral $d+id$ superconductors on the kagome lattice. The study is motivated by recent experimental developments reporting evidence of time-reversal symmetry breaking in the superconducting state of kagome metals. Using self-consistent microscopic calculations that incorporate the characteristics of the band structure of the kagome lattice, we find that fractional vortices permeate the ground state condensate in the presence of an external field. Each fractional vortex carries one third of the superconducting flux quantum and exhibits a characteristic signature related to one of the three sublattice degrees of freedom of the kagome lattice. We discuss the relevance of these results to recent experimental studies of kagome superconductors in the presence of an external magnetic field. |
| title | Fractional $1/3$ quantum vortices in chiral $d+id$ kagome superconductors |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2602.17399 |