A supercurrent switch in graphene $\pi$-junctions
Superconductivity
2009-11-13 v1
Abstract
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.
Keywords
Cite
@article{arxiv.0804.2542,
title = {A supercurrent switch in graphene $\pi$-junctions},
author = {Jacob Linder and Takehito Yokoyama and Daniel Huertas-Hernando and Asle Sudbø},
journal= {arXiv preprint arXiv:0804.2542},
year = {2009}
}
Comments
4 pages, 3 figures. High-quality figures available in published version. Accepted for publication in Phys. Rev. Lett