A1 Refereed original research article in a scientific journal

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




AuthorsSakai S, Majumdar S, Popov ZI, Avramov PV, Entani S, Hasegawa Y, Yamada Y, Huhtinen H, Naramoto H, Sorokin PB, Yamauchi Y

PublisherAMER CHEMICAL SOC

Publication year2016

JournalACS Nano

Journal name in sourceACS NANO

Journal acronymACS NANO

Volume10

Issue8

First page 7532

Last page7541

Number of pages10

ISSN1936-0851

DOIhttps://doi.org/10.1021/acsnano.6b02424


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 Lac(0.7)Sr(0.3)MnO(3) (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 pi band structure.



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