Dirac-fermions and conductance-oscillations in (s,d)-wave superconductor/normal graphene junctions

Abstract

We investigate quantum transport in a normal/superconductor graphene heterostructure, including the possibility of an anisotropic pairing potential in the superconducting region. We find that under certain circumstances, the conductance displays an undamped, oscillatory behaviour as a function of applied bias voltage. Also, we investigate how the conductance spectra are affected by a d-wave pairing symmetry. These results combine unusual features of the electronic structure of graphene with the unconventional pairing symmetry found for instance in high-T_c superconductors.

4 pages, 2 figures. Accepted for publication in Phys. Rev. Lett

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• Chiral tunneling and the Klein paradox in graphene
• Bipolar supercurrent in graphene
• Specular Andreev reflection in graphene
• Quantum supercurrent transistors in carbon nanotubes
• Tunneling conductance of graphene NIS junctions

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• Heat transport by Dirac fermions in normal/superconducting graphene junctions
• $\pi$-junction qubit in monolayer graphene