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arXiv · 0704.1820

Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures

Klaus Halterman·Paul H. Barsic·Oriol T. Valls
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Abstract

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 $α$ 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 $α$. 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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Klaus Halterman, Paul H. Barsic, Oriol T. Valls. 2007-04-13. Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures. https://doi.org/10.1103/physrevlett.99.127002

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