Unconventional Hall Effect in Gapless Superconductors: Transverse Supercurrent Converted from Normal Current
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866910973706633216 |
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| author | Wei, Miaomiao Xiang, Longjun Xu, Fuming Wang, Bin Wang, Jian |
| author_facet | Wei, Miaomiao Xiang, Longjun Xu, Fuming Wang, Bin Wang, Jian |
| contents | A normal metallic system proximitized by a superconductor can exhibit a gapless superconducting state characterized by segmented Fermi surfaces, as confirmed experimentally. In such a state, quasiparticle states remain gapless along one direction, while a superconducting gap opens in the perpendicular direction. This anisotropy enables a novel Hall effect in gapless superconductors, termed the superconducting Hall effect (ScHE), where a longitudinal normal current carried by quasiparticles is converted into a dissipationless transverse supercurrent. Employing both the thermodynamic approach for bulk systems and quantum transport theory for a four-probe setup, we demonstrate the existence of this effect and reveal its intrinsic origin as the quasiparticle Berry curvature. The predicted ScHE can be experimentally verified via the standard angular-dependent Hall measurements performed on gapless superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_23278 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unconventional Hall Effect in Gapless Superconductors: Transverse Supercurrent Converted from Normal Current Wei, Miaomiao Xiang, Longjun Xu, Fuming Wang, Bin Wang, Jian Mesoscale and Nanoscale Physics A normal metallic system proximitized by a superconductor can exhibit a gapless superconducting state characterized by segmented Fermi surfaces, as confirmed experimentally. In such a state, quasiparticle states remain gapless along one direction, while a superconducting gap opens in the perpendicular direction. This anisotropy enables a novel Hall effect in gapless superconductors, termed the superconducting Hall effect (ScHE), where a longitudinal normal current carried by quasiparticles is converted into a dissipationless transverse supercurrent. Employing both the thermodynamic approach for bulk systems and quantum transport theory for a four-probe setup, we demonstrate the existence of this effect and reveal its intrinsic origin as the quasiparticle Berry curvature. The predicted ScHE can be experimentally verified via the standard angular-dependent Hall measurements performed on gapless superconductors. |
| title | Unconventional Hall Effect in Gapless Superconductors: Transverse Supercurrent Converted from Normal Current |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2505.23278 |