Induced Superconductivity in Graphene Grown on Rhenium

C. Tonnoir; A. Kimouche; J. Coraux; L. Magaud; B. Delsol; B. Gilles; C. Chapelier

doi:10.1103/PhysRevLett.111.246805

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Induced Superconductivity in Graphene Grown on Rhenium

C. Tonnoir, A. Kimouche, J. Coraux, L. Magaud, B. Delsol, B. Gilles, C. Chapelier

DOI 10.1103/PhysRevLett.111.246805 · Physical Review Letters

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Abstract

We report a new way to strongly couple graphene to a superconductor. The graphene monolayer has been grown directly on top of a superconducting Re(0001) thin film and characterized by scanning tunneling microscopy and spectroscopy. We observed a moiré pattern due to the mismatch between Re and graphene lattice parameters that we have simulated with ab initio calculations. The density of states around the Fermi energy appears to be position dependent on this moiré pattern. Tunneling spectroscopy performed at 50 mK shows that the superconducting behavior of graphene on Re is well described by the Bardeen-Cooper-Schrieffer theory and stands for a very good interface between the graphene and its metallic substrate.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Re Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.6	Pressure not reported	unknown