Josephson coupling through a magnetic racetrack
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arXiv
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910129079713792 |
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| author | Mazanik, A. A. Bergeret, F. S. |
| author_facet | Mazanik, A. A. Bergeret, F. S. |
| contents | We investigate the Josephson coupling between two superconducting electrodes connected by a ferromagnetic racetrack hosting a Bloch-like domain wall (DW). We show that the interplay between superconductivity and the DW leads to highly non-trivial spatial distributions of the supercurrent, including the formation of current loops and a strong sensitivity to the DW position and orientation. We further demonstrate that the Josephson critical current $I_c$ can be efficiently controlled by the DW position along the racetrack, exhibiting pronounced variations and tunable $0$--$π$ transitions. These results provide clear design principles for superconducting racetrack devices and establish domain walls as a viable control element for readout schemes in racetrack memory architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_12742 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Josephson coupling through a magnetic racetrack Mazanik, A. A. Bergeret, F. S. Superconductivity We investigate the Josephson coupling between two superconducting electrodes connected by a ferromagnetic racetrack hosting a Bloch-like domain wall (DW). We show that the interplay between superconductivity and the DW leads to highly non-trivial spatial distributions of the supercurrent, including the formation of current loops and a strong sensitivity to the DW position and orientation. We further demonstrate that the Josephson critical current $I_c$ can be efficiently controlled by the DW position along the racetrack, exhibiting pronounced variations and tunable $0$--$π$ transitions. These results provide clear design principles for superconducting racetrack devices and establish domain walls as a viable control element for readout schemes in racetrack memory architectures. |
| title | Josephson coupling through a magnetic racetrack |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2604.12742 |