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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2403.04851 |
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| _version_ | 1866929552816603136 |
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| author | Giil, Hans Gløckner Brekke, Bjørnulf Linder, Jacob Brataas, Arne |
| author_facet | Giil, Hans Gløckner Brekke, Bjørnulf Linder, Jacob Brataas, Arne |
| contents | Conducting altermagnets have recently emerged as intriguing materials supporting strongly spin-polarized currents without magnetic stray fields. We demonstrate that altermagnets enable three key functionalities, merging superconductivity and spintronics. The first prediction is a controllable supercurrent-induced edge magnetization, which acts like a dissipationless spin-splitter effect. The second and third predictions are a Cooper pair spin-splitter and a filtering effect, respectively. These effects allow for spatial separation of triplet pairs with opposite spin-polarizations and spin-selective tunneling of Cooper pairs. We derive a quasiclassical theory with associated boundary conditions that describe these phenomena and explain how they can be experimentally verified. Our results open a new path for spatial control of spin signals via triplet Cooper pairs using hybrid superconductor-altermagnet devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_04851 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets Giil, Hans Gløckner Brekke, Bjørnulf Linder, Jacob Brataas, Arne Superconductivity Conducting altermagnets have recently emerged as intriguing materials supporting strongly spin-polarized currents without magnetic stray fields. We demonstrate that altermagnets enable three key functionalities, merging superconductivity and spintronics. The first prediction is a controllable supercurrent-induced edge magnetization, which acts like a dissipationless spin-splitter effect. The second and third predictions are a Cooper pair spin-splitter and a filtering effect, respectively. These effects allow for spatial separation of triplet pairs with opposite spin-polarizations and spin-selective tunneling of Cooper pairs. We derive a quasiclassical theory with associated boundary conditions that describe these phenomena and explain how they can be experimentally verified. Our results open a new path for spatial control of spin signals via triplet Cooper pairs using hybrid superconductor-altermagnet devices. |
| title | Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2403.04851 |