Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures

Details Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures

2007-04-13

arxiv.org/abs/0704.1820v1

Phys. Rev Lett. 99, 127002 (2007)

Physics

Condensed Matter

Superconductivity

Four pages, including four figures

Scientific paper

10.1103/PhysRevLett.99.127002

We study triplet pairing correlations in clean Ferromagnet (F)/Superconductor (S) nanojunctions, via fully self consistent solution of the Bogoliubov-de Gennes equations. We consider FSF trilayers, with S being an s-wave superconductor, and an arbitrary angle $\alpha$ between the magnetizations of the two F layers. We find that contrary to some previous expectations, triplet correlations, odd in time, are induced in both the S and F layers in the clean limit. We investigate their behavior as a function of time, position, and $\alpha$. The triplet amplitudes are largest at times on the order of the inverse ``Debye'' frequency, and at that time scale they are long ranged in both S and F. The zero temperature condensation energy is found to be lowest when the magnetizations are antiparallel.

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