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.

spin anisotropy

2D ferromagnet

Cr2Ge2Te6

proximity effect

magnetism

van der Waals heterostructures

graphene

Author

Bogdan Karpiak

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Aron W. Cummings

Spanish National Research Council (CSIC)

Barcelona Institute of Science and Technology (BIST)

Klaus Zollner

University of Regensburg

Marc Vila

Spanish National Research Council (CSIC)

Universitat Autonoma de Barcelona (UAB)

Barcelona Institute of Science and Technology (BIST)

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

Catalan Institution for Research and Advanced Studies

Barcelona Institute of Science and Technology (BIST)

Spanish National Research Council (CSIC)

Saroj Prasad Dash

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

2D Materials

2053-1583 (eISSN)

Vol. 7 1 015026

Subject Categories

Other Materials Engineering

Condensed Matter Physics

DOI

10.1088/2053-1583/ab5915

More information

Latest update

6/8/2020 1