We have studied mesoscopic Josephson junctions formed by highly n-doped InAs nanowires and superconducting Ti/Pb source and drain leads. The current-voltage properties of the system are investigated by varying temperature and external out-of-plane magnetic field. Superconductivity in the Pb electrodes persists up to ∼7 K and with magnetic field values up to 0.4 T. Josephson coupling at zero backgate voltage is observed up to 4.5 K and the critical current is measured to be as high as 615 nA. The supercurrent suppression as a function of the magnetic field reveals a diffraction pattern that is explained by a strong magnetic flux focusing provided by the superconducting electrodes forming the junction.
|Titolo:||Pb/InAs nanowire josephson junction with high critical current and magnetic flux focusing|
|Data di pubblicazione:||2015|
|Parole Chiave:||InAs; Josephson effect; Nanowire; Pb; magnetic flux focusing|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1021/nl504544s|
|Appare nelle tipologie:||1.1 Articolo in rivista|