Spin-split superconductivity in spin-orbit coupled hybrid nanowires with ferromagnetic barriers
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917310926684160 |
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| author | Zhao, J. Mazanik, A. Razmadze, D. Liu, Y. Krogstrup, P. Bergeret, F. S. Vaitiekėnas, S. |
| author_facet | Zhao, J. Mazanik, A. Razmadze, D. Liu, Y. Krogstrup, P. Bergeret, F. S. Vaitiekėnas, S. |
| contents | We report transport studies of hybrid Josephson junctions based on semiconducting InAs nanowires with fully overlapping epitaxial ferromagnetic insulator EuS and superconducting Al partial shells. Current-biased measurements reveal a hysteretic superconducting window with a sizable supercurrent near the coercive field of the ferromagnetic insulator, accompanied by multiple Andreev reflections. Tunneling spectroscopy shows a superconducting gap characterized by three peaks, which we attribute to tunneling between exchange-split superconductors. A theoretical model reproduces the observed features and indicates that spin mixing, driven by sizable spin-orbit coupling, is essential to their formation. Our results demonstrate proximity-induced superconductivity through a ferromagnetic insulator and establish a new platform for exploring spin-triplet pairing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_08247 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin-split superconductivity in spin-orbit coupled hybrid nanowires with ferromagnetic barriers Zhao, J. Mazanik, A. Razmadze, D. Liu, Y. Krogstrup, P. Bergeret, F. S. Vaitiekėnas, S. Mesoscale and Nanoscale Physics Superconductivity We report transport studies of hybrid Josephson junctions based on semiconducting InAs nanowires with fully overlapping epitaxial ferromagnetic insulator EuS and superconducting Al partial shells. Current-biased measurements reveal a hysteretic superconducting window with a sizable supercurrent near the coercive field of the ferromagnetic insulator, accompanied by multiple Andreev reflections. Tunneling spectroscopy shows a superconducting gap characterized by three peaks, which we attribute to tunneling between exchange-split superconductors. A theoretical model reproduces the observed features and indicates that spin mixing, driven by sizable spin-orbit coupling, is essential to their formation. Our results demonstrate proximity-induced superconductivity through a ferromagnetic insulator and establish a new platform for exploring spin-triplet pairing. |
| title | Spin-split superconductivity in spin-orbit coupled hybrid nanowires with ferromagnetic barriers |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2506.08247 |