Long-Range Superharmonic Josephson Current

Abstract

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 ($I\propto \sin 2\varphi$).

4 pages, 3 figures

References in corpus (3)

• Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction
• Quantum limit of the triplet proximity effect in half-metal - superconductor junctions
• Andreev reflection at half-metal-superconductor interfaces with non-uniform magnetization

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