Physics – Condensed Matter – Superconductivity
Scientific paper
2010-08-06
Phys. Rev. B 82, 024515 (2010)
Physics
Condensed Matter
Superconductivity
6 pages, 4 figures, extended version of arXiv:0911.1646
Scientific paper
The Josephson current through a long s-wave superconductor/weak ferromagnet/s-wave superconductor weak link is studied theoretically in the regime of nonequilibrium spin-dependent occupation of electron states in the ferromagnetic intelayer. While under the considered nonequilibrium conditions the standard supercurrent, carried by the singlet part of current-carrying density of states, practically is not modified, the additional supercurrent flowing via the triplet part of the current-carrying density of states appears. Depending on voltage, controlling the particular form of spin-dependent nonequilibrium in the interlayer, this additional current can enhance or reduce the usual current of the singlet component and also switch the junction between $0$- and $\pi$-states.
Bobkov A. M.
Bobkova I. V.
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