A supercurrent switch in graphene $π$-junctions

Details A supercurrent switch in graphene $π$-junctions A supercurrent switch in graphene $π$-junctions

2008-04-16

arxiv.org/abs/0804.2542v1

Phys. Rev. Lett. 100, 187004 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures. High-quality figures available in published version. Accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.187004

We study the supercurrent in a superconductor/ferromagnet/superconductor graphene junction. In contrast to its metallic counterpart, the oscillating critical current in our setup decays only weakly upon increasing exchange field and junction width. We find an unusually large residual value of the supercurrent at the oscillatory cusps due to a strong deviation from a sinusoidal current-phase relationship. Our findings suggest a very efficient device for dissipationless supercurrent switching.

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