title: Direct penetration of spin-triplet superconductivity into a ferromagnet in Au/SrRuO3/Sr2RuO4junctions.
abstract: Efforts have been ongoing to establish superconducting spintronics utilizing ferromagnet/superconductor heterostructures. Previously reported devices are based on spin-singlet superconductors (SSCs), where the spin degree of freedom is lost. Spin-polarized supercurrent induction in ferromagnetic metals (FMs) is achieved even with SSCs, but only with the aid of interfacial complex magnetic structures, which severely affect information imprinted to the electron spin. Use of spin-triplet superconductors (TSCs) with spin-polarizable Cooper pairs potentially overcomes this difficulty and further leads to novel functionalities. Here, we report spin-triplet superconductivity induction into a FM SrRuO3from a leading TSC candidate Sr2RuO4, by fabricating microscopic devices using an epitaxial SrRuO3/Sr2RuO4hybrid. The differential conductance, exhibiting Andreev-reflection features with multiple energy scales up to around half tesla, indicates the penetration of superconductivity over a considerable distance of 15 nm across the SrRuO3layer without help of interfacial complex magnetism. This demonstrates potential utility of FM/TSC devices for superspintronics.
authors: Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors: M S
authors: MS
authors: Anwar
authors: Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|Department of Physics and Astronomy, Seoul National University (SNU), Seoul 151-742, Republic of Korea.
authors: S R
authors: SR
authors: Lee
authors: Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan.|RIKEN Center for Emergent Matter Science, Saitama 351-0198, Japan.|Department of Mathematical and Physical Sciences, Faculty of Science, Japan Women's University, Tokyo 112-8681, Japan.
authors: R
authors: R
authors: Ishiguro
authors: Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors: Y
authors: Y
authors: Sugimoto
authors: Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan.
authors: Y
authors: Y
authors: Tano
authors: Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|Department of Physics and Astronomy, Seoul National University (SNU), Seoul 151-742, Republic of Korea.
authors: S J
authors: SJ
authors: Kang
authors: Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|Department of Physics and Astronomy, Seoul National University (SNU), Seoul 151-742, Republic of Korea.
authors: Y J
authors: YJ
authors: Shin
authors: Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors: S
authors: 0000-0002-7476-3604
authors: S
authors: Yonezawa
authors: Max-Planck-Institut fur Festkorperforschung, Stuttgart D-70569, Germany.
authors: D
authors: D
authors: Manske
authors: Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan.
authors: H
authors: H
authors: Takayanagi
authors: Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|Department of Physics and Astronomy, Seoul National University (SNU), Seoul 151-742, Republic of Korea.
authors: T W
authors: TW
authors: Noh
authors: Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors: Y
authors: Y
authors: Maeno