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Magnetic proximity in a van der Waals heterostructure of magnetic insulator and graphene
Chalmers Univ Technol, Dept Microtecnol & Nanosci, SE-41296 Gothenburg, Sweden.
CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Barcelona 08193, Spain;Barcelona Inst Sci & Technol, Campus UAB, Barcelona 08193, Spain.
Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany.
CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Barcelona 08193, Spain;Barcelona Inst Sci & Technol, Campus UAB, Barcelona 08193, Spain;Univ Autonoma Barcelona, Dept Phys, E-08193 Barcelona, Spain.
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2020 (English)In: 2D MATERIALS, ISSN 2053-1583, Vol. 7, article id 015026Article in journal (Refereed) Published
Abstract [en]

Engineering 2D material heterostructures by combining the best of different materials in one ultimate unit can offer a plethora of opportunities in condensed matter physics. Here, in the van der Waals heterostructures of the ferromagnetic insulator Cr2Ge2Te6 and graphene, our observations indicate an out-of-plane proximity-induced ferromagnetic exchange interaction in graphene. The perpendicular magnetic anisotropy of Cr2Ge2Te6 results in significant modification of the spin transport and precession in graphene, which can be ascribed to the proximity-induced exchange interaction. Furthermore, the observation of a larger lifetime for perpendicular spins in comparison to the in-plane counterpart suggests the creation of a proximity-induced anisotropic spin texture in graphene. Our experimental results and density functional theory calculations open up opportunities for the realization of proximity-induced magnetic interactions and spin filters in 2D material heterostructures and can form the basic building blocks for future spintronic and topological quantum devices.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2020. Vol. 7, article id 015026
Keywords [en]
graphene, 2D ferromagnet, van der Waals heterostructures, Cr2Ge2Te6, proximity effect, magnetism, spin anisotropy
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-402654DOI: 10.1088/2053-1583/ab5915ISI: 000504310700001OAI: oai:DiVA.org:uu-402654DiVA, id: diva2:1387055
Funder
EU, Horizon 2020, 785219Swedish Research Council, 2015-06813Swedish Research Council, 2016-03658Available from: 2020-01-20 Created: 2020-01-20 Last updated: 2020-01-20Bibliographically approved

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