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arXiv · 1004.5124

Triplet supercurrent due to spin-active zones in a Josephson junction

Jacob Linder·Asle Sudbø
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Abstract

Motivated by a recent experiment evidencing triplet superconductivity in a ferromagnetic Josephson junction with a Cu$_2$MnAl-Heusler barrier, we construct a theoretical model accounting for this observation. The key ingredients in our model which generate the triplet supercurrent are \textit{spin-active zones}, characterised by an effective canted interface magnetic moment. Using a numerical solution of the quasiclassical equations of superconductivity with spin-active boundary conditions, we find qualitatively very good agreement with the experimentally observed supercurrent. Further experimental implications of the spin-active zones are discussed.

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Jacob Linder, Asle Sudbø. 2010-04-28. Triplet supercurrent due to spin-active zones in a Josephson junction. https://doi.org/10.1103/physrevb.82.020512

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