title: Spin-dependent cooper pair phase and pure spin supercurrents in strongly polarized ferromagnets.
abstract: We study heterostructures of singlet superconductors and strongly spin-polarized ferromagnets and show that a relative phase arises between the superconducting proximity amplitudes in the two ferromagnetic spin bands. We find a tunable pure spin supercurrent in a spin-polarized ferromagnet contacted with only one superconductor electrode. We show that Josephson junctions are most effective for a spin polarization P approximately 0.3, and that critical currents for positive and negative bias differ for a high transmission Josephson junction, due to a relative phase between single and double pair transmission.
authors: Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures, Universität Karlsruhe, D-76128 Karlsruhe, Germany.
authors: R
authors: R
authors: Grein
authors: M
authors: M
authors: Eschrig
authors: G
authors: G
authors: Metalidis
authors: Gerd
authors: G
authors: Schön