Triplet contribution to the Josephson current in the nonequilibrium superconductor/ferromagnet/superconductor junction

I. V. Bobkova; A. M. Bobkov

doi:10.1103/PhysRevB.82.024515

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Triplet contribution to the Josephson current in the nonequilibrium superconductor/ferromagnet/superconductor junction

I. V. Bobkova, A. M. Bobkov

DOI 10.1103/PhysRevB.82.024515 · Physical Review B

T1

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Abstract

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 interlayer. 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 π states.