Nonlocal conductance spectroscopy of Andreev bound states in gate-defined InAs/Al nanowires

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The charge character of Andreev bound states (ABSs) in a three-terminal semiconductor-superconductor hybrid nanowire was measured using local and nonlocal tunneling spectroscopy. The device is fabricated using an epitaxial InAs/Al two-dimensional heterostructure with several gate-defined side probes. ABSs give rise to distinct local and nonlocal conductance signatures which evolve as a function of magnetic field and gate voltage. At high magnetic fields, ABSs are found to oscillate around zero as a function of gate voltage, with modifications of their charge consistent with expectations for the total Bardeen-Cooper-Schrieffer charge of ABSs.

OriginalsprogEngelsk
Artikelnummer241301
TidsskriftPhysical Review B
Vol/bind106
Udgave nummer24
Antal sider5
ISSN2469-9950
DOI
StatusUdgivet - 12 dec. 2022

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