journal article·2016-08-23Open access

Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite

Seiji Sakai, Sayani Majumdar, Zakhar I. Popov, Pavel V. Avramov, Shiro Entani, Yuri Hasegawa, Yoichi Yamada, Hannu Huhtinen, Hiroshi Naramoto, Pavel B. Sorokin, Yasushi Yamauchi

ACS Nano· Volume 10· Issue 8

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.
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Research context

OpenAlex topics: Academic and Historical Perspectives in Psychology

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Affiliations

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

Department of Applied Physics, Aalto University School of Science, FI-00076 Aalto, Finland

National University of Science and Technology MISiS, 4 Leninskiy Prospekt, Moscow 119049, Russian Federation

Department of Chemistry, College of Natural Sciences, Kyungpook National University, Daegu 702-701, Republic of Korea

Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014, Turku, Finland

Technological Institute of Superhard and Novel Carbon Materials, 7a Centralnaya Street, Troitsk, Moscow 142190, Russian Federation

Funding

Japan Society for the Promotion of Science · Japan Science and Technology Agency · Ministry of Education and Science of the Russian Federation · Russian Science Foundation

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