Superconducting Transport in single and parallel double InAs Quantum Dot Josephson Junctions with Nb-based Superconducting Electrodes

Abstract

We report conductance and supercurrent measurements for InAs single and parallel double quantum dot Josephson junctions contacted with Nb or NbTiN superconducting electrodes. Large superconducting gap energy, high critical field and large switching current are observed, all reflecting the features of Nb-based electrodes. For the parallel double dots we observe an enhanced supercurrent when both dots are on resonance, which may reflect split Cooper pair tunneling.

13 pages, 4 figures and supplemental material

References in corpus (10)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
• Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
• Near-unity Cooper pair splitting efficiency
• Kondo Universal Scaling for a Quantum Dot Coupled to Superconducting Leads
• Local electrical tuning of the nonlocal signals in a Cooper pair splitter
• Pb/InAs nanowire Josephson junction with high critical current and magnetic flux focusing
• Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots
• Superconducting Transport in single and parallel double InAs Quantum Dot Josephson Junctions with Nb-based Superconducting Electrodes
• π junction transition in InAs self-assembled quantum dot coupled with SQUID

Cited by in corpus (9)

• Dominant non-local superconducting proximity effect due to electron-electron interaction in a ballistic double nanowire
• Phase-dependent heat and charge transport through superconductor-quantum dot hybrids
• MBE Growth of Al/InAs and Nb/InAs Superconducting Hybrid Nanowire Structures
• Single-electron charge sensing in self-assembled quantum dots
• Josephson junctions in double nanowires bridged by in-situ deposited superconductors
• Tuning the two-electron hybridization and spin states in parallel-coupled InAs quantum dots
• Superconducting Transport in single and parallel double InAs Quantum Dot Josephson Junctions with Nb-based Superconducting Electrodes
• Superconductor-quantum dot hybrid coolers
• Gate tunable parallel double quantum dot in InAs double-nanowire junctions