0-$π$ transition in magnetic triplet superconductor Josephson junctions

Details 0-$π$ transition in magnetic triplet superconductor Josephson junctions 0-$π$ transition in magnetic triplet superconductor Josephson junctions

2009-01-26

arxiv.org/abs/0901.4096v2

Phys. Rev. Lett. 103, 147001 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, RevTeX, version accepted to PRL

Scientific paper

10.1103/PhysRevLett.103.147001

We examine a Josephson junction involving two arbitrary equal-spin-pairing unitary triplet superconductors and a ferromagnetic tunneling barrier. Using perturbation theory, we show how the interaction of the barrier moment with the spin of the tunneling triplet Cooper pairs can reverse the sign of the Josephson charge current. This also results in a Josephson spin current, which contains a phase-independent contribution due to reflection processes at the barrier. We verify our analytic predictions using a non-perturbative Bogoliubov-de Gennes method.

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