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

S. Sakai, Sayani Majumdar, Z. I. Popov, P. V. Avramov, S. Entani, Y. Hasegawa, Y. Yamada, H. Huhtinen, H. Naramoto, P. B. Sorokin, Y. Yamauchi

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26 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)7532-7541
JournalACS Nano
Volume10
Issue number8
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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    Sakai, S., Majumdar, S., Popov, Z. I., Avramov, P. V., Entani, S., Hasegawa, Y., Yamada, Y., Huhtinen, H., Naramoto, H., Sorokin, P. B., & Yamauchi, Y. (2016). Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite. ACS Nano, 10(8), 7532-7541. https://doi.org/10.1021/acsnano.6b02424