Triplet supercurrent in ferromagnetic Josephson junctions by spin injection

Abstract

We show that injecting nonequilibrium spins into the superconducting leads strongly enhances the stationary Josephson current through a superconductor-ferromagnet-superconductor junction. The resulting long-range super-current through a ferromagnet is carried by triplet Cooper pairs that are formed in s-wave superconductors by the combined effects of spin injection and exchange interaction. We quantify the exchange interaction in terms of Landau Fermi-liquid factors. The magnitude and direction of the long-range Josephson current can be manipulated by varying the angles of the injected polarizations with respect to the magnetization in the ferromagnet.

References in corpus (4)

• Direct electronic measurement of the spin Hall effect
• Spin injection and relaxation in a mesoscopic superconductor
• Spin Transport in Diffusive Superconductors
• Long-range proximity effect for opposite-spin pairs in S/F heterostructures under non-equilibrium quasiparticle distribution

Cited by in corpus (10)

• Superconducting Spintronics
• Proximity Induced Vortices and Long-Range Triplet Supercurrents in Ferromagnetic Josephson Junctions and Spin Valves
• Generation of pure superconducting spin current in magnetic heterostructures via non-locally induced magnetism due to Landau Fermi-liquid effects
• Spin Controlled Coexistence of 0 and π States in SFSFS Josephson Junctions
• Possible evidence for spin-transfer torque induced by spin-triplet supercurrent
• Spin-Orbit-Induced Spin, Charge, and Energy Transport in Diffusive Superconductors
• Supercurrent generation by spin injection in an s-wave superconductor-Rashba metal bilayer
• Magnetic field tunable superconducting transition in Nb/Co/Py/Nb exchange spring multilayers
• Long-Range triplet Josephson Current driven by the bias voltage
• Unconventional domain wall magnetoresistance of patterned Ni/Nb bilayer structures below superconducting transition temperature of Nb