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Carbon nanotube Josephson junctions with Nb contacts

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Pallecchi, Emiliano ; Gaaß, Markus ; Ryndyk, Dmitry ; Strunk, Christoph
Date of publication of this fulltext: 05 Aug 2009 13:58


We report on the preparation of carbon nanotube Josephson junctions using superconducting electrodes made of niobium. Gate-controllable supercurrents with values of up to 30 nA are induced by the proximity effect. The IV curves are hysteretic at low temperature and the corresponding switching histograms have a width of 0.5%–2%. An on-chip resistive environment integrated in the sample layout is used to increase the switching current.

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