Long-Range triplet Josephson Current driven by the bias voltage
arXiv:1312.2339 · doi:10.1016/j.physleta.2014.05.021
Abstract
We study the long-range triplet Josephson current in a clean junction composed of two s-wave superconductors and a normal-metal/ferromagnet/normal-metal trilayer. Through applying the bias voltages on the metal regions by two antiparallel half-metal electrodes, we show that the amplitude and direction of this long-range current can be controlled easily and flexibly. Such current arises from the fact that the applied voltage can produce a nonequilibrium spin-dependent quasiparticle distribution in the metal regions so that the Cooper pairs acquire an extra momenta, which will lead to a spin-flip processes in the metal regions. This processes can produce the parallel spin triplet pairs in the central ferromagnet layer. In particular, if the voltage is applied only on one metal region, we further find that the recently discovered long-range superharmonic Josephson current will appear because of the transport of an even number of parallel spin triplet pairs.
arXiv admin note: text overlap with arXiv:1309.6807
References in corpus (7)
- A spin triplet supercurrent through the half-metallic ferromagnet CrO2
- Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
- Superharmonic long-range triplet current in a diffusive Josephson junction
- Magnetic-coupling-dependent spin-triplet supercurrents in helimagnet/ferromagnet Josephson junctions
- Long-range proximity effect for opposite-spin pairs in S/F heterostructures under non-equilibrium quasiparticle distribution
- Long-Range triplet Josephson Current Modulated by the Interface Magnetization Texture
- Triplet supercurrent in ferromagnetic Josephson junctions by spin injection