Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 97: Superconducting Diodes and Ratchets
TT 97.1: Vortrag
Freitag, 13. März 2026, 09:30–09:45, CHE/0089
Josephson Diode Effect of All-Metallic Lateral Junctions with Interfacial Rashba Spin-Orbit Coupling — •Maximilian Mangold1, 2, Lorenz Bauriedl3, Johanna Berger3, Chang Yu-Cheng4, Thomas N.G. Meier1, 2, Matthias Kronseder3, Pertti Hakonen5, Christian H. Back1, 2, Christoph Strunk3, and Dhavala Suri1, 6 — 1School of Natural Sciences, Technical University of Munich, Garching b. Munich, Germany — 2Center for Quantum Engineering (ZQE), Technical University of Munich, Garching b. Munich, Germany — 3Department of Physics, University of Regensburg, Regensburg, Germany — 4Pico Group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, Aalto, Finland — 5Low Temperature Laboratory, Department of Applied Physics, Aalto University, Espoo, Finland — 6Centre for Nanoscience and Engineering, Indian Institute of Science, Bengaluru, India
The Josephson diode effect (JDE) is investigated in diffusive Josephson junctions incorporating only metallic materials. We find a magneto-chiral anisotropy in the JDE for devices with Fe/Pt and Cu/Pt weak links between Nb leads. The observed symmetry corresponds to Rashba spin-orbit coupling (SOC). In a simple Cu junction without a structural inversion asymmetry, the diode efficiency is finite, but field-angle independent. Our results suggest the generality of Rashba SOC for the JDE beyond the realm of high-mobility systems. Additionally, we observe an inverted hysteresis in the Fraunhofer patterns of all samples and explain it based on the critical state model of strongly pinned vortices without relying on SOC.
Keywords: Josephson Diode Effect; Magneto-Chiral Anisotropy; All-Metallic; Rashba Spin-Orbit Coupling; Inverted Hysteresis