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Magnetochiral Anisotropy in Josephson Diode Effect of All-Metallic Lateral Junctions with Interfacial Rashba
Maximilian Mangold1,2, Lorenz Bauriedl3,4, Johanna Berger3,4
1Technical University of Munich, School of Natural Sciences, 85748 Garching, Germany.
None:
We explore the role of interfacial Rashba spin-orbit coupling (SOC) for the Josephson diode effect in all-metal diffusive Josephson junctions. Devices with Fe/Pt and Cu/Pt weak links between Nb leads reveal a Josephson diode effect in an in-plane magnetic field with magnetochiral anisotropy according to the point symmetry of Rashba SOC. The Rashba SOC originates from inversion symmetry breaking at the metal-metal interfaces. A control sample with a plain Cu layer as weak link, in contrast, exhibits an axis-symmetric diode effect. The Fraunhofer patterns display an apparent inverted hysteresis that can be traced back to stray fields resulting from the conventional hysteretic vortex pinning in the Nb contacts.
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