Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers.
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Authors
Piquemal-Banci, Maëlis
Galceran, Regina
Dubois, Simon M-M
Zatko, Victor
Martin, Marie-Blandine
Petroff, Frédéric
Fert, Albert
Robertson, John
Seneor, Pierre
Publication Date
2020-11-09Journal Title
Nat Commun
ISSN
2041-1723
Publisher
Springer Science and Business Media LLC
Volume
11
Issue
1
Pages
5670
Language
eng
Type
Article
This Version
VoR
Physical Medium
Electronic
Metadata
Show full item recordCitation
Piquemal-Banci, M., Galceran, R., Dubois, S. M., Zatko, V., Galbiati, M., Godel, F., Martin, M., et al. (2020). Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers.. Nat Commun, 11 (1), 5670. https://doi.org/10.1038/s41467-020-19420-6
Abstract
We report on spin transport in state-of-the-art epitaxial monolayer graphene based 2D-magnetic tunnel junctions (2D-MTJs). In our measurements, supported by ab-initio calculations, the strength of interaction between ferromagnetic electrodes and graphene monolayers is shown to fundamentally control the resulting spin signal. In particular, by switching the graphene/ferromagnet interaction, spin transport reveals magneto-resistance signal MR > 80% in junctions with low resistance × area products. Descriptions based only on a simple K-point filtering picture (i.e. MR increase with the number of layers) are not sufficient to predict the behavior of our devices. We emphasize that hybridization effects need to be taken into account to fully grasp the spin properties (such as spin dependent density of states) when 2D materials are used as ultimately thin interfaces. While this is only a first demonstration, we thus introduce the fruitful potential of spin manipulation by proximity effect at the hybridized 2D material / ferromagnet interface for 2D-MTJs.
Sponsorship
Engineering and Physical Sciences Research Council (EP/P005152/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (785219)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (881603)
Identifiers
External DOI: https://doi.org/10.1038/s41467-020-19420-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/315953
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