Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions

Details Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions

2012-02-21

arxiv.org/abs/1202.4774v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

We report electronic transport measurements of graphene contacted by NbTiN electrodes, which at low temperature remain superconducting up to at least 11 Tesla. In devices with a single superconducting contact, we find a more than twofold enhancement of the conductance at zero bias, which we interpret in terms of reflectionless tunneling. In devices with two superconducting contacts, we observe the Josephson effect, bipolar supercurrents and Fraunhofer patterns.

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