2020
DOI: 10.1038/s41467-020-19420-6
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Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers

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. Description… Show more

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Cited by 50 publications
(79 citation statements)
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“…Graphene, besides being considered as a candidate for traditional electronics [1], has recently found applications in emerging fields such as spintronic devices [2,3], offering long spin lifetimes and long spin propagation lengths [4]. While graphene exhibits negligible intrinsic spin-orbit coupling (SOC), it can be amplified by a proximity effect [5], for example when integrated with a heavier atom [6,7,8].…”
Section: Introductionmentioning
confidence: 99%
“…Graphene, besides being considered as a candidate for traditional electronics [1], has recently found applications in emerging fields such as spintronic devices [2,3], offering long spin lifetimes and long spin propagation lengths [4]. While graphene exhibits negligible intrinsic spin-orbit coupling (SOC), it can be amplified by a proximity effect [5], for example when integrated with a heavier atom [6,7,8].…”
Section: Introductionmentioning
confidence: 99%
“…Although most C − Fe bonds are not clearly seen as C − C, there is an area of slightly higher density between C 1 and Fe 1 (displayed by the broken circle), which is one of the closest Fe-C pairs. In addition, the average Fe-C binding distance is approximately 2 Å, which is a typical value for chemisorbed metal/Gr interfaces 14,23 . The graphene surface is slightly bumpy on the atomic scale; the vertical position of the C 1 atom is approximately 0.0?…”
Section: Resultsmentioning
confidence: 94%
“…We show a device fabrication based on the above studied WS 2 /WSe 2 /WS 2 2D heterostructure with a tailored well-type energetic landscape. We use the Ni(111) substrate as a conductive bottom electrode for our devices . We then carry out a laser lithography step on a spin-coated UVIII resist layer to open small 1 μm 2 windows above the van der Waals heterostructure.…”
Section: Resultsmentioning
confidence: 99%
“…We use the Ni(111) substrate as a conductive bottom electrode for our devices. 72 We then carry out a laser lithography step on a spin-coated UVIII resist layer to open small 1 μm 2 windows above the van der Waals heterostructure. A top Au-capped Co electrode is finally deposited by e-beam evaporation.…”
Section: Resultsmentioning
confidence: 99%