期刊
NANO LETTERS
卷 15, 期 3, 页码 1803-1808出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl504544s
关键词
Nanowire; InAs; Josephson effect; Pb; magnetic flux focusing
类别
资金
- Marie Curie Initial Training Action (ITN) Q-NET [264034]
- Tuscany region through the project :TERASQUID
- European Research Council under the European Union [615187-COMANCHE]
- Spanish Ministry of Economy and Competitiveness [FIS2011-28851-C02-02]
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 similar 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 .
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