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EnglishWe 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 | |
| Autori: | ||
| Data di pubblicazione: | 2015 | |
| Rivista: | ||
| Parole Chiave: | InAs; Josephson effect; Nanowire; Pb; magnetic flux focusing | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/nl504544s | |
| Handle: | http://hdl.handle.net/11384/59016 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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