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

Sakai, Seiji  ,  Majumdar, Sayani  ,  アヴラモフ, パベル  ,  V. Avramov, Pavel  ,  圓谷, 志郎  ,  Hasegawa, Yuri  ,  Yamada, Yoichi  ,  Huhtinen, Hannu  ,  楢本, 洋  ,  パベル, ソロキン  ,  山内, 泰

10 ( 8 )  , pp.7532 - 7541 , 2016-08
The role of proximity contact with magnetic oxides is of particular interests 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 a 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  band structure.

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