Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene

Details Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene

2006-10-18

arxiv.org/abs/cond-mat/0610508v1

Phys.Rev.B 75, 045426 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.75.045426

A ballistic strip of graphene (width W>> length L) connecting two normal metal contacts is known to have a minimum conductivity of 4e^{2}/pi h at the Dirac point of charge neutrality. We calculate what happens if one of the two contacts becomes superconducting. While the ballistic conductance away from the Dirac point is increased by Andreev reflection at the normal-superconductor (NS) interface, we find that the minimum conductivity stays the same. This is explained as a manifestation of pseudo-diffusive conduction at the Dirac point. As a generalization of our results for a ballistic system, we provide a relation between the conductance G_NS of an arbitrarily disordered normal-superconductor junction in graphene and its value G_N when both contacts are in the normal state.

Affiliated with

Also associated with

No associations

Rating

Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-99336