Electrical control of Kondo effect and superconducting transport in a side-gated InAs quantum dot Josephson junction

Abstract

We measure the non-dissipative supercurrent in a single InAs self-assembled quantum dot (QD) coupled to superconducting leads. The QD occupation is both tuned by a back-gate electrode and lateral side-gate. The geometry of the side-gate allows tuning of the QD-lead tunnel coupling in a region of constant electron number with appropriate orbital state. Using the side-gate effect we study the competition between Kondo correlations and superconducting pairing on the QD, observing a decrease in the supercurrent when the Kondo temperature is reduced below the superconducting energy gap in qualitative agreement with theoretical predictions.

References in corpus (14)

• Supercurrent reversal in quantum dots
• Quantum supercurrent transistors in carbon nanotubes
• Spectral properties of locally correlated electrons in a BCS superconductor
• Critical Current 0-$\pi$ Transition in Designed Josephson Quantum Dot Junctions
• Josephson current through a single Anderson impurity coupled to BCS leads
• Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
• Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
• Kondo Universal Scaling for a Quantum Dot Coupled to Superconducting Leads
• Large anisotropy of spin-orbit interaction in a single InAs self-assembled quantum dot
• Kondo effect in asymmetric Josephson couplings through a quantum dot
• Superconducting non-equilibrium transport through a weakly interacting quantum dot
• Lateral electron tunneling through single self-assembled InAs quantum dots coupled to superconducting nanogap electrodes
• Gate Tunable Dissipation and "Superconductor-Insulator" Transition in Carbon Nanotube Josephson Transistors
• Origin of Hysteresis in a Proximity Josephson Junction

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• Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
• Anomalous Josephson current, incipient time-reversal symmetry breaking, and Majorana bound states in interacting multi-level dots
• Interplay of Kondo and superconducting correlations in the nonequilibrium Andreev transport through a quantum dot
• Scaling of sub-gap excitations in a superconductor-semiconductor nanowire quantum dot
• Quantum-Dot Parity Effects in Trivial and Topological Josephson Junctions
• Study of 0-$\pi$ phase transition in hybrid superconductor-InSb nanowire quantum dot devices
• Josephson effect in a few-hole quantum dot
• Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots
• Single-electron charge sensing in self-assembled quantum dots
• Spin filtering in a Rashba-Dresselhaus-Aharonov-Bohm double-dot interferometer
• Superconducting Transport in single and parallel double InAs Quantum Dot Josephson Junctions with Nb-based Superconducting Electrodes
• Fractional Josephson effect in a quadruple quantum dot
• Properties of the Majorana-state tunneling Josephson junction mediated by an interacting quantum dot
• Erasing odd-parity states in semiconductor quantum dots coupled to superconductors
• AC Josephson transport through interacting quantum dots
• Shiba Bound States across the mobility edge in doped InAs nanowires
• First order $0/\pi$ quantum phase transition in the Kondo regime of a superconducting carbon nanotube quantum dot
• SU(2)-SU(4) Kondo Crossover and Emergent Electric Polarization in a Triangular Triple Quantum Dot
• π junction transition in InAs self-assembled quantum dot coupled with SQUID
• Kondo Effect in Defect-bound Quantum Dots Coupled to NbSe${}_2$
• Influence of superconducting leads energy gap on electron transport through double quantum dot by Markovian quantum master equation approach