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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.24822 |
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| _version_ | 1866916042670866432 |
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| author | Jiao, Na Qiao, Shu-Xiang Zhou, Pan Lu, Hong-Yan Zhang, Ping |
| author_facet | Jiao, Na Qiao, Shu-Xiang Zhou, Pan Lu, Hong-Yan Zhang, Ping |
| contents | Kagome superconductors featuring topologically nontrivial band structures have attracted extensive research interest. FeSn and CoSn is a new kind of kagome material with intrinsic magnetism, which suppresses the emergence of superconductivity. Here, we theoretically predict a new kind of 1:1 kagome MSn (M=transition metal), which exhibit intrinsic superconductivity and nontrivial band topology by first-principles calculations. Among twenty-seven candidates, MSn (M= Mo, Hf, Nb, Ta, W, Ti) are theoretically identified as both dynamically and thermodynamical stable. And, five non-magnetic MSn (M= Mo, Hf, Nb, Ta, W) exhibit phonon-mediated superconductivity. Especially, the d orbitals bands display Dirac points and van Hove singularities near the Fermi level, which contribute to the emergence of topology and the electron-phonon coupling (EPC). More interestingly, MoSn, HfSn and NbSn show nontrivial topological band structure at the Fermi level. Thus, the predicted MSn establish a platform integrating superconductivity and topological order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_24822 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Prediction of 1:1 kagome metals with superconductivity and band topology Jiao, Na Qiao, Shu-Xiang Zhou, Pan Lu, Hong-Yan Zhang, Ping Superconductivity Kagome superconductors featuring topologically nontrivial band structures have attracted extensive research interest. FeSn and CoSn is a new kind of kagome material with intrinsic magnetism, which suppresses the emergence of superconductivity. Here, we theoretically predict a new kind of 1:1 kagome MSn (M=transition metal), which exhibit intrinsic superconductivity and nontrivial band topology by first-principles calculations. Among twenty-seven candidates, MSn (M= Mo, Hf, Nb, Ta, W, Ti) are theoretically identified as both dynamically and thermodynamical stable. And, five non-magnetic MSn (M= Mo, Hf, Nb, Ta, W) exhibit phonon-mediated superconductivity. Especially, the d orbitals bands display Dirac points and van Hove singularities near the Fermi level, which contribute to the emergence of topology and the electron-phonon coupling (EPC). More interestingly, MoSn, HfSn and NbSn show nontrivial topological band structure at the Fermi level. Thus, the predicted MSn establish a platform integrating superconductivity and topological order. |
| title | Prediction of 1:1 kagome metals with superconductivity and band topology |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2605.24822 |