Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions

Details Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions

2011-06-16

arxiv.org/abs/1106.3333v1

Phys. Rev. B 84, 035407 (2011)

Physics

Condensed Matter

Superconductivity

7 Pages and 4 Figures. To Appear in Physical Review B

Scientific paper

10.1103/PhysRevB.84.035407

We theoretically calculate the charge-supercurrent through a ballistic graphene junction where superconductivity is induced via the proximity-effect. Both monolayer and bilayer graphene are considered, including the possibility of strain in the systems. We demonstrate that the supercurrent at the charge neutrality point can be tuned efficiently by means of mechanical strain. Remarkably, the supercurrent is enhanced or suppressed relative to the non-strained case depending on the direction of this strain. We also calculate the Fano factor in the normal-state of the system and show how its behavior varies depending on the direction of strain.

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