Magnetic proximity in a van der Waals heterostructure of magnetic insulator and graphene
Journal article, 2020
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.
graphene
proximity effect
2D ferromagnet
van der Waals heterostructures
Cr2Ge2Te6
spin anisotropy
magnetism
Author
Bogdan Karpiak
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Aron W. Cummings
Barcelona Institute of Science and Technology (BIST)
Klaus Zollner
University of Regensburg
Marc Vila
Barcelona Institute of Science and Technology (BIST)
Universitat Autonoma de Barcelona (UAB)
Dmitrii Khokhriakov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Anamul Md Hoque
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
André Dankert
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Peter Svedlindh
Uppsala University
Jaroslav Fabian
University of Regensburg
Stephan Roche
Barcelona Institute of Science and Technology (BIST)
Catalan Institution for Research and Advanced Studies
Saroj Prasad Dash
Graphene Centre at Chalmers
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
2D Materials
2053-1583 (eISSN)
Vol. 7 1 015026Subject Categories
Other Materials Engineering
Condensed Matter Physics
DOI
10.1088/2053-1583/ab5915