Long-Range Superharmonic Josephson Current

Details Long-Range Superharmonic Josephson Current Long-Range Superharmonic Josephson Current

2011-01-27

arxiv.org/abs/1101.5416v2

Phys. Rev. Lett. 107, 047001 (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.107.047001

We consider a long superconductor-ferromagnet-superconductor junction with one spin-active region. It is shown that an \textit{odd} number of Cooper pairs cannot have a long-range propagation when there is \textit{only one} spin-active region. When temperature is much lower than the Thouless energy, the coherent transport of \textit{two} Cooper pairs becomes dominant process and the \textit{superharmonic} current-phase relation is obtained ($I\propto\sin2\phi$).

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