title: Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite.
abstract: The role of proximity contact with magnetic oxides is of particular interest from the expectations of the induced spin polarization and weak interactions at the graphene/magnetic oxide interfaces, which would allow us to achieve efficient spin-polarized injection in graphene-based spintronic devices. A combined approach of topmost-surface-sensitive spectroscopy utilizing spin-polarized metastable He atoms and ab initio calculations provides us direct evidence for the magnetic proximity effect in the junctions of single-layer graphene and half-metallic manganite La0.7Sr0.3MnO3 (LSMO). It is successfully demonstrated that in the graphene/LSMO junctions a sizable spin polarization is induced at the Fermi level of graphene in parallel to the spin polarization direction of LSMO without giving rise to a significant modification in the π band structure.
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology QST , 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.|National Institute for Materials Science , Tsukuba, Ibaraki 305-0047, Japan.|Institute of Applied Physics, University of Tsukuba , 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
authors.forename: Seiji
authors.initials: S
authors.lastname: Sakai
authors.affiliation: Department of Applied Physics, Aalto University School of Science , FI-00076 Aalto, Finland.
authors.forename: Sayani
authors.initials: S
authors.lastname: Majumdar
authors.affiliation: National University of Science and Technology MISiS , 4 Leninskiy Prospekt, Moscow 119049, Russian Federation.
authors.forename: Zakhar I
authors.initials: ZI
authors.lastname: Popov
authors.affiliation: Department of Chemistry, College of Natural Sciences, Kyungpook National University , Daegu 702-701, Republic of Korea.
authors.forename: Pavel V
authors.initials: PV
authors.lastname: Avramov
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology QST , 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Entani
authors.affiliation: Institute of Applied Physics, University of Tsukuba , 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Hasegawa
authors.affiliation: Institute of Applied Physics, University of Tsukuba , 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Yamada
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku , 20014, Turku, Finland.
authors.forename: Hannu
authors.initials: H
authors.lastname: Huhtinen
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology QST , 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Naramoto
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology QST , 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.|National University of Science and Technology MISiS , 4 Leninskiy Prospekt, Moscow 119049, Russian Federation.|Technological Institute of Superhard and Novel Carbon Materials , 7a Centralnaya Street, Troitsk, Moscow 142190, Russian Federation.
authors.forename: Pavel B
authors.initials: PB
authors.lastname: Sorokin
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology QST , 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.|National Institute for Materials Science , Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yamauchi
keywords: graphene; half-metals; interface; magnetic oxides; proximity effect; spin polarization; spintronics