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

Research output: Contribution to journalArticleScientificpeer-review

19 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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Spin polarization
Graphite
Graphene
proximity
graphene
polarization
Oxides
Magnetoelectronics
metastable atoms
oxides
Fermi level
Band structure
manganite
Spectroscopy
injection
Atoms
spectroscopy
interactions

Cite this

Sakai, S., Majumdar, S., Popov, Z. I., Avramov, P. V., Entani, S., Hasegawa, Y., ... 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
Sakai, S. ; Majumdar, Sayani ; Popov, Z. I. ; Avramov, P. V. ; Entani, S. ; Hasegawa, Y. ; Yamada, Y. ; Huhtinen, H. ; Naramoto, H. ; Sorokin, P. B. ; Yamauchi, Y. / Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite. In: ACS Nano. 2016 ; Vol. 10, No. 8. pp. 7532-7541.
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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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Sakai, S, Majumdar, S, Popov, ZI, Avramov, PV, Entani, S, Hasegawa, Y, Yamada, Y, Huhtinen, H, Naramoto, H, Sorokin, PB & Yamauchi, Y 2016, 'Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite', ACS Nano, vol. 10, no. 8, pp. 7532-7541. https://doi.org/10.1021/acsnano.6b02424

Proximity-Induced Spin Polarization of Graphene in Contact with Half-Metallic Manganite. / Sakai, S.; Majumdar, Sayani; Popov, Z. I.; Avramov, P. V.; Entani, S.; Hasegawa, Y.; Yamada, Y.; Huhtinen, H.; Naramoto, H.; Sorokin, P. B.; Yamauchi, Y.

In: ACS Nano, Vol. 10, No. 8, 2016, p. 7532-7541.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Sakai, S.

AU - Majumdar, Sayani

AU - Popov, Z. I.

AU - Avramov, P. V.

AU - Entani, S.

AU - Hasegawa, Y.

AU - Yamada, Y.

AU - Huhtinen, H.

AU - Naramoto, H.

AU - Sorokin, P. B.

AU - Yamauchi, Y.

PY - 2016

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AB - 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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