Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures

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 $\alpha$ 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.

Four pages, including four figures

References in corpus (3)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Triplet proximity effect in FSF trilayers
• Effect of an inhomogeneous exchange field on the proximity effect in disordered superconductor-ferromagnet hybrid structures

Cited by in corpus (3)

• Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
• Theory of superconducting and magnetic proximity effect in S$\mid$F structures with inhomogeneous magnetization textures and spin-active interfaces
• Proximity effect in ferromagnet/superconductor hybrids: from diffusive to ballistic motion