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

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

2007-07-30

arxiv.org/abs/0707.4406v1

Phys. Rev. Lett 99, 147001 (2007)

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1103/PhysRevLett.99.147001

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.

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