Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers
| Autor: | Robert S. Weatherup, Simon M-M Dubois, Frédéric Petroff, Victor Zatko, Pierre Seneor, Bruno Dlubak, Jean-Christophe Charlier, Regina Galceran, Albert Fert, Stephan Hofmann, John Robertson, Marie-Blandine Martin, Florian Godel, Maëlis Piquemal-Banci, Marta Galbiati |
|---|---|
| Přispěvatelé: | Unité mixte de physique CNRS/Thales (UMPhy CNRS/THALES), Centre National de la Recherche Scientifique (CNRS)-THALES, UCL - SST/IMCN/MODL - Modelling, Galbiati, Marta [0000-0002-6021-5156], Godel, Florian [0000-0003-1741-2741], Weatherup, Robert S [0000-0002-3993-9045], Charlier, Jean-Christophe [0000-0002-5749-1328], Hofmann, Stephan [0000-0001-6375-1459], Dlubak, Bruno [0000-0001-5696-8991], Apollo - University of Cambridge Repository, Weatherup, Robert S. [0000-0002-3993-9045] |
| Rok vydání: | 2020 |
| Předmět: |
120
Materials science Science General Physics and Astronomy Genetics and Molecular Biology 02 engineering and technology Materials science Nanoscience and technology 010402 general chemistry 01 natural sciences Signal Article General Biochemistry Genetics and Molecular Biology law.invention Engineering Nanoscience and technology law Monolayer Proximity effect (superconductivity) 128 639/925 [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] lcsh:Science Spin-½ [PHYS]Physics [physics] 639/166 639/301 Multidisciplinary Spintronics Condensed matter physics Nanotecnologia Graphene Physics 639/766 General Chemistry Ciència dels materials 5104 Condensed Matter Physics 021001 nanoscience & nanotechnology 0104 chemical sciences Ferromagnetism General Biochemistry Density of states lcsh:Q Condensed Matter::Strongly Correlated Electrons 119 0210 nano-technology 51 Physical Sciences |
| Zdroj: | Nature Communications Nature Communications, Nature Publishing Group, 2020, 11 (5670), ⟨10.1038/s41467-020-19420-6⟩ Piquemal-Banci, M. Galceran, Regina Dubois, Simon M.-M. Zatko, V. Galbiati, Marta Godel, Florian Martin, M.-B. Weatherup, Robert S. Petroff, F. Fert, Albert Charlier, Jean-Christophe Robertson, John Hofmann, Stephan Dlubak, Bruno Seneor, Pierre 2020 Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers Nature Communications 11 5670 RODERIC: Repositorio Institucional de la Universitat de Valéncia instname Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020) RODERIC. Repositorio Institucional de la Universitat de Valéncia Nature Communications, Vol. 11, no.1, p.-(2020) |
| ISSN: | 2041-1723 |
| Popis: | 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. 2D materials are foreseen as an opportunity to tailor spintronics devices interfaces, a.k.a spinterfaces. Here, using state-of-the-art large-scale integration in spin-valves, authors demonstrate that hybridization of graphene with a metallic spin source results in strong spin filtering effects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|