Zeeman effect induced 0-$\pi$ transitions in ballistic Dirac semimetal Josephson junctions

Abstract

One of the consequences of Cooper pairs having a finite momentum in the interlayer of a Josephson junction, is $\pi$-junction behavior. The finite momentum can either be due to an exchange field in ferromagnetic Josephson junctions, or due to the Zeeman effect. Here, we report the observation of Zeeman effect induced 0-$\pi$ transitions in Bi${}_{1-x}$Sb${}_x$, 3D Dirac semimetal-based Josephson junctions. The large g-factor of the Zeeman effect from a magnetic field applied in the plane of the junction allows tuning of the Josephson junctions from 0- to $\pi$- regimes. This is revealed by sign changes in the modulation of the critical current by applied magnetic field of an asymmetric superconducting quantum interference device (SQUID). Additionally, we directly measure a non-sinusoidal current-phase relation in the asymmetric SQUID, consistent with models for ballistic Josephson transport.

References in corpus (13)

• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• Direct coupling between magnetism and superconducting current in Josephson Phi junction
• Anomalous Josephson effect induced by spin-orbit interaction and Zeeman effect in semiconductor nanowires
• Spin-Orbit induced phase-shift in Bi${}_2$Se${}_3$ Josephson junctions
• Measurement of the current-phase relation of superconducting atomic contacts
• Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry
• Proximity and Josephson effects in superconductor - two dimensional electron gas planar junctions
• $4\pi$ periodic Andreev bound states in a Dirac semimetal
• Angle-resolved Landau spectrum of electrons and holes in bismuth
• Quantum interference and supercurrent in multiple-barrier proximity structures
• 0-$\pi$ quantum transition in a carbon nanotube Josephson junction: universal phase dependence and orbital degeneracy
• Suppression of surface p-wave superconductivity in disordered topological insulators
• 0-Pi quantum transition in a carbon nanotube Josephson junction: Universal phase dependence and orbital degeneracy

Cited by in corpus (16)

• Ballistic superconductivity and tunable $\pi$-junctions in InSb quantum wells
• Sign reversal of the AC and DC supercurrent diode effect and 0-$\pi$-like transitions in ballistic Josephson junctions
• Ferromagnetic Materials for Josephson π Junctions
• Planar graphene-NbSe${}_2$ Josephson junctions in a parallel magnetic field
• Current-phase relation of a WTe2 Josephson junction
• Zeeman-driven parity transitions in an Andreev quantum dot
• Limitations of the current-phase relation measurements by an asymmetric dc-SQUID
• Direct measurement of a $\sin (2\phi )$ current phase relation in a graphene superconducting quantum interference device
• Zeeman and Orbital Driven Phase Transitions in Planar Josephson Junctions
• Superconducting proximity effect in $d$-wave cuprate/ graphene heterostructures
• High magnetic field stability in a planar graphene-NbSe${}_2$ SQUID
• Combined Zeeman and orbital effect on the Josephson effect in rippled graphene
• Temporarily enhanced superconductivity from magnetic fields
• Diamond-shaped evolution of the superconducting interference pattern in NbTiN weak-link Josephson junctions
• Probing the topological protection of edge states in multilayer tungsten ditelluride with the superconducting proximity effect
• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields