Costa, Andreas and Kanehira, Osamu and Matsueda, Hiroaki and Fabian, Jaroslav (2025) Unconventional Josephson supercurrent diode effect induced by chiral spin-orbit coupling. PHYSICAL REVIEW B, 111 (14): L140506. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Chiral materials lacking mirror symmetry can exhibit unconventional spin-orbit fields, including fully momentum-aligned radial Rashba fields as seen in twisted van der Waals homobilayers. We theoretically study Cooper-pair transfer in superconductor/ferromagnet/superconductor Josephson junctions with crossed (tangential and radial) interfacial Rashba fields. We find that their interplay leads to what we call the unconventional supercurrent diode effect (SDE), where supercurrent rectification occurs even with collinear (with respect to the current) barrier magnetization, not possible for conventional spin-orbit fields. This SDE, distinct from conventional Rashba-induced effects on Cooper-pair momenta, arises from the spin precession in the magnetic barrier. We propose it as a sensitive probe of chiral spin textures.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Jul 2026 08:26 |
| Last Modified: | 15 Jul 2026 08:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66348 |
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