Anomalous negative magnetoresistance in quantum-dot Josephson junctions with Kondo correlations
arXiv:1808.07003 · doi:10.1007/s11433-024-2382-1
Abstract
The interplay between superconductivity and the Kondo effect has stimulated significant interest in condensed matter physics. They compete when their critical temperatures are close and can give rise to a quantum phase transition that can mimic Majorana zero modes. Here, we have fabricated and measured Al-InSb nanowire quantum dot-Al devices. In the Kondo regime, a supercurrent- induced zero-bias conductance peak emerges. This zero-bias peak shows an anomalous negative magnetoresistance (NMR) at weak magnetic fields. We attribute this anomalous NMR to quasi- particle trapping at vortices in the superconductor leads as a weak magnetic field is applied. The trapping effect lowers the quasiparticle-caused dissipation and thus enhances the Josephson current. This work connects the vortex physics and the supercurrent tunneling in Kondo regimes and can help further understand the physics of Josephson quantum dot system.
arXiv comment11 pages, 10 figures, Supplemental Materials
References in corpus (29)
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- A Tunable Kondo Effect in Quantum Dots
- Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
- Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
- Supercurrent reversal in quantum dots
- Single-electron current sources: towards a refined definition of ampere
- Revealing the electronic structure of a carbon nanotube carrying a supercurrent
- Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
- Zero-voltage conductance peak from weak antilocalization in a Majorana nanowire
- A Quantum Dot in the Kondo Regime Coupled to Superconductors
- Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
- Multiple Andreev Reflections in a Carbon Nanotube Quantum Dot
- Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful Josephson Junction
- Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
- Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
- Supercurrent and multiple Andreev reflections in an InSb nanowire Josephson junction
- Effective g-factor in Majorana Wires
- Multi-mode Fabry-Pérot conductance oscillations in suspended stacking-faults-free InAs nanowires
- Transport Measurement of Andreev Bound States in a Kondo-Correlated Quantum Dot
- Kondo resonance enhanced supercurrent in single wall carbon nanotube Josephson junctions
- Magnetically-driven colossal supercurrent enhancement in InAs nanowire Josephson junctions
- Study of 0- phase transition in hybrid superconductor-InSb nanowire quantum dot devices
- Electrostatic control of the proximity effect in the bulk of semiconductor-superconductor hybrids
- Coherent Charge Transport in Ballistic InSb Nanowire Josephson Junctions
- Recent progress on Majorana in semiconductor-superconductor heterostructures--Engineering and detection
- Experimental review on Majorana zero-modes in hybrid nanowires
- Quasiparticle trapping at vortices producing Josephson supercurrent enhancement