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| Format: | Preprint |
| Veröffentlicht: |
2026
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| Online-Zugang: | https://arxiv.org/abs/2605.31501 |
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| _version_ | 1866918531755409408 |
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| author | Dsouza, Reuel Parthenios, Nikolaos Andersen, Brian M. Christensen, Morten H. |
| author_facet | Dsouza, Reuel Parthenios, Nikolaos Andersen, Brian M. Christensen, Morten H. |
| contents | Recent experimental observations in the noncentrosymmetric Weyl semimetal PtBi$_2$ indicate unconventional superconductivity hosted by topological surface states -- Weyl Fermi arcs -- with a node at the center of each arc. Focusing on these Fermi arcs, we calculate the electronically mediated pairing interaction using a Kohn-Luttinger approach and find that, in a large region of the phase diagram, the leading superconducting instability has an $i$-wave symmetry featuring precisely such an intra-arc node. We study the dependence of the leading superconducting instabilities on electronic interaction parameters and chemical potential and show that the $i$-wave state is robust to changes in the model parameters. Our results provide a possible mechanism for the observation of topological $i$-wave superconductivity on the surface of PtBi$_2$ and may have implications for the broader landscape of superconducting instabilities arising from repulsive interactions on the surfaces of Weyl semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_31501 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Kohn-Luttinger Superconductivity of Weyl Fermi Arcs in PtBi$_2$ Dsouza, Reuel Parthenios, Nikolaos Andersen, Brian M. Christensen, Morten H. Superconductivity Recent experimental observations in the noncentrosymmetric Weyl semimetal PtBi$_2$ indicate unconventional superconductivity hosted by topological surface states -- Weyl Fermi arcs -- with a node at the center of each arc. Focusing on these Fermi arcs, we calculate the electronically mediated pairing interaction using a Kohn-Luttinger approach and find that, in a large region of the phase diagram, the leading superconducting instability has an $i$-wave symmetry featuring precisely such an intra-arc node. We study the dependence of the leading superconducting instabilities on electronic interaction parameters and chemical potential and show that the $i$-wave state is robust to changes in the model parameters. Our results provide a possible mechanism for the observation of topological $i$-wave superconductivity on the surface of PtBi$_2$ and may have implications for the broader landscape of superconducting instabilities arising from repulsive interactions on the surfaces of Weyl semimetals. |
| title | Kohn-Luttinger Superconductivity of Weyl Fermi Arcs in PtBi$_2$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2605.31501 |