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

Abstract

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.

6 pages, 5 figures

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Cited by in corpus (5)

• Fermion-parity anomaly of the critical supercurrent in the quantum spin-Hall effect
• Strongly disordered TiN and NbTiN s-wave superconductors probed by microwave electrodynamics
• Superconducting proximity effect in a transparent van der Waals superconductor-metal junction
• Revisiting Andreev processes in superconductor-graphene-superconductor (SGS) Josephson junctions: Comparison with experimental results
• Effect of Andreev Processes on the Goos-Hänchen (GH) shift in the Graphene-Superconductor-Graphene (GSG) junctions