Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry

Abstract

In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance. The supercurrent nonreciprocity can be described as a consequence of the anomalous Josephson effect -- a ${\phi }_0$-shift of the current-phase relation -- in multichannel ballistic junctions with strong spin-orbit interaction. In this work, we simultaneously investigate ${\phi }_0$-shift and supercurrent diode efficiency on the same Josephson junction by means of a superconducting quantum interferometer. By electrostatic gating, we reveal a direct link between ${\phi }_0$-shift and diode effect. Our findings show that the supercurrent diode effect mainly results from magnetochiral anisotropy induced by spin-orbit interaction in combination with a Zeeman field.

15 pages, 8 figures

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• Unconventional Josephson supercurrent diode effect induced by chiral spin-orbit coupling
• Josephson diode effect in one-dimensional quantum wires connected to superconductors with mixed singlet-triplet pairing
• Transverse Cooper-Pair Rectifier
• Tunable superconducting diode effect in higher-harmonic InSb nanosheet interferometers
• Josephson Diode Effect from Nonequilibrium Current in a Superconducting Interferometer
• Transport Signatures of Radial Rashba Spin-Orbit Coupling at Ferromagnet/Superconductor Interfaces
• Spin-resolved Josephson diode effect through strongly spin-polarized conical magnets
• ${\varphi }_0$-junction and Josephson diode effect in high-temperature superconductor
• Four-terminal Josephson junctions: diode effects, anomalous currents and transverse currents
• Spontaneous supercurrents and vortex depinning in two-dimensional arrays of ${\phi }_0$-junctions
• Electric Control of Polarity in Spin-Orbit Josephson Diode
• Gate-tunable Josephson diodes in magic-angle twisted bilayer graphene
• Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
• Anomalous phase shift and superconducting diode effect in Josephson junctions via thin films of rare-earth intermetallic magnets
• Diode effect in a skyrmion-coupled high-temperature Josephson junction
• Phase-sensitive non-reciprocal transport in high-temperature superconductor
• Nanoscale electrothermal-switch superconducting diode for electrically programmable superconducting circuits