Observation of Anomalous Josephson Effect in Nonequilibrium Andreev Interferometers

Abstract

The first evidence of anomalous Josephson effect is reported in mesoscopic superconductor-normal metal-superconductor (SNS) junctions forming a crosslike Andreev Interferometer in the absence of magnetic and spin-orbit interactions normally required to break time-reversal and inversion symmetries. From conductance measurements of the out-of-equilibrium weak link, we determine a voltage-controlled spontaneous phase that resembles a ${\phi }_0$-junction. The temperature and voltage dependences together with a dissipative term in the current-phase relation strongly suggest that the mechanism underlying the observed phenomenon relies on electron-hole asymmetries.

6 pages, 3 figures

References in corpus (5)

• Supercurrent reversal in quantum dots
• Direct coupling between magnetism and superconducting current in Josephson Phi junction
• Josephson junctions with negative second harmonic in the current-phase relation: properties of novel varphi-junctions
• 0-pi Josephson tunnel junctions with ferromagnetic barrier
• Experimental evidence of a ϕ Josephson junction

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• Ferromagnetic Materials for Josephson π Junctions
• Engineered Josephson diode effect in kinked Rashba nanochannels
• Back-action supercurrent diodes
• Magnonic $\phi$ Josephson junctions and synchronized precession
• Anomalous Josephson diode effect in superconducting multilayers
• Josephson Diode Effect from Nonequilibrium Current in a Superconducting Interferometer
• Ballistic Andreev interferometers
• Four-terminal Josephson junctions: diode effects, anomalous currents and transverse currents
• Nonequilibrium Andreev resonances in ballistic graphene Andreev interferometers