Graphene on TaC: Air tight protection of a superconducting surface
Z (nm)
Résumé
We report on the fabrication of a clean, stable in room atmosphere and superconducting surface consisting of graphene on tantalum carbide (TaC) obtained by high-temperature annealing of a tantalum thin film on SiC. Low temperature scanning tunneling spectroscopy reveals that the surface is superconducting with a superconducting order parameter up to 1.6 meV. In addition, atomically-resolved imaging establishes the chemical inertness of the surface. This result is achieved because few graphene layers protect the surface superconductivity of the buried superconducting TaC formed during the high-temperature annealing.
Origine | Fichiers produits par l'(les) auteur(s) |
---|