Reduced decay in Josephson coupling across ferromagnetic junctions with spin-orbit coupling layers
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914916349247488 |
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| author | Kindiak, Ivan Mishra, Swapna Sindhu Migliorini, Andrea Pal, Banabir Parkin, Stuart S. P. |
| author_facet | Kindiak, Ivan Mishra, Swapna Sindhu Migliorini, Andrea Pal, Banabir Parkin, Stuart S. P. |
| contents | The generation of $S_z=1$ triplet Cooper pairs has been predicted theoretically in superconducting-ferromagnetic hybrid heterostructures in the presence of spin-orbit coupling [F. S. Bergeret and I. V. Tokatly, Phys. Rev. B 89, 134517 (2014) and Jacobsen et al., Sci. Rep. 6, 23926 (2016)]. In this study, we experimentally investigate vertical Josephson junctions where the weak link is formed from a ferromagnetic layer with perpendicular magnetic anisotropy sandwiched by two non-magnetic layers with weak or strong spin-orbit coupling. We find that the decay of the Josephson coupling is reduced in the latter case, possibly indicating the presence of $S_z=1$ spin-triplet correlations. We speculate that the canted magnetization required for these correlations is provided by the interaction of magnetization with Meissner effect in the superconducting layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_19799 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Reduced decay in Josephson coupling across ferromagnetic junctions with spin-orbit coupling layers Kindiak, Ivan Mishra, Swapna Sindhu Migliorini, Andrea Pal, Banabir Parkin, Stuart S. P. Superconductivity Mesoscale and Nanoscale Physics The generation of $S_z=1$ triplet Cooper pairs has been predicted theoretically in superconducting-ferromagnetic hybrid heterostructures in the presence of spin-orbit coupling [F. S. Bergeret and I. V. Tokatly, Phys. Rev. B 89, 134517 (2014) and Jacobsen et al., Sci. Rep. 6, 23926 (2016)]. In this study, we experimentally investigate vertical Josephson junctions where the weak link is formed from a ferromagnetic layer with perpendicular magnetic anisotropy sandwiched by two non-magnetic layers with weak or strong spin-orbit coupling. We find that the decay of the Josephson coupling is reduced in the latter case, possibly indicating the presence of $S_z=1$ spin-triplet correlations. We speculate that the canted magnetization required for these correlations is provided by the interaction of magnetization with Meissner effect in the superconducting layers. |
| title | Reduced decay in Josephson coupling across ferromagnetic junctions with spin-orbit coupling layers |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.19799 |