Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- PhysRevB.107.L081301
Final published version, 1.41 MB, PDF document
We report supercurrent transport measurements in hybrid Josephson junctions comprising semiconducting InAs nanowires with epitaxial ferromagnetic insulator EuS and superconducting Al coatings. The wires display a hysteretic superconducting window close to the coercivity, away from zero external magnetic field. Using a multi-interferometer setup, we measure the current-phase relation of multiple magnetic junctions and find an abrupt switch between pi and 0 phases within the superconducting window. We attribute the 0-pi transition to the discrete flipping of the EuS domains and provide a qualitative theory showing that a sizable exchange field can polarize the junction and lead to the supercurrent reversal. Both 0 and pi phases can be realized at zero external field by demagnetizing the wire.
Original language | English |
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Article number | 081301 |
Journal | Physical Review B |
Volume | 107 |
Issue number | 8 |
Number of pages | 6 |
ISSN | 2469-9950 |
DOIs | |
Publication status | Published - 13 Feb 2023 |
- TRIPLET SUPERCONDUCTIVITY, CRITICAL FIELD, INSULATOR
Research areas
Links
- https://arxiv.org/pdf/2204.03202.pdf
Submitted manuscript
ID: 340974494