Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions
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Dokumenter
- PhysRevB.107.L081301
Forlagets udgivne version, 1,41 MB, PDF-dokument
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.
Originalsprog | Engelsk |
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Artikelnummer | 081301 |
Tidsskrift | Physical Review B |
Vol/bind | 107 |
Udgave nummer | 8 |
Antal sider | 6 |
ISSN | 2469-9950 |
DOI | |
Status | Udgivet - 13 feb. 2023 |
Links
- https://arxiv.org/pdf/2204.03202.pdf
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