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Showing 1–4 of 4 results
Advanced filters: Author: D. Z. Haxell Clear advanced filters

  • A recent finding of tuning critical current in metallic nanowires by application of small gate voltages seems at odds with general understanding. Here, Ritter et al. study similar nanowires and link the origin of the critical current suppression to tunneling of few high-energy electrons between gate and nanowire, ruling out direct tuning by electric fields.

    • M. F. Ritter
    • A. Fuhrer
    • F. Nichele
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • The authors study conductance replicas emerging under microwave irradiation in the tunnelling spectrum of Josephson junctions in InAs/Al heterostructures, focusing on distinguishing the signatures of Floquet-Andreev states (FASs) from those of photon-assisted tunneling (PAT). They establish that PAT largely dominates the response to microwave radiation in their device.

    • Daniel Z. Haxell
    • Marco Coraiola
    • Fabrizio Nichele
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • The authors study Andreev bound states (ABSs) in 3-terminal InAs/Al Josephson-junction devices. They find signatures of hybridization between two ABSs, with band structure tunable by electric currents that generate magnetic fluxes threading superconducting loops in the device.

    • Marco Coraiola
    • Daniel Z. Haxell
    • Fabrizio Nichele
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-7

  • Suppression of superconductivity in metallic nanowires due to a gate voltage can be linked to the relaxation of high-energy electrons and not to the presence of electric fields at the superconductor surface.

    • M. F. Ritter
    • N. Crescini
    • F. Nichele
    ResearchOpen Access
    Nature Electronics
    Volume: 5, P: 71-77