Proximity induced room-temperature ferromagnetism in graphene probed with spin currents

Abstract

The introduction and control of ferromagnetism in graphene opens up a range of new directions for fundamental and applied studies. Several approaches have been pursued so far, such as introduction of defects, functionalization with adatoms, and shaping of graphene into nanoribbons with well-defined zigzag edges. A more robust and less invasive method utilizes the introduction of an exchange interaction by a ferromagnetic insulator in proximity with graphene. Here we present a direct measurement of the exchange interaction in room temperature ferromagnetic graphene. We study the spin transport in exfoliated graphene on a yttrium-iron-garnet substrate where the observed spin precession clearly indicates the presence and strength of an exchange field that is an unambiguous evidence of induced ferromagnetism. We describe the results with a modified Bloch diffusion equation and extract an average exchange field of the order of 0.2 T. Further, we demonstrate that a proximity induced 2D ferromagnet can efficiently modulate a spin current by controlling the direction of the exchange field. These results can create a building block for magnetic-gate tuneable spin transport in one-atom-thick spintronic devices.

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• Graphene Spintronics
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• Magnetic Moment Formation in Graphene Detected by Scattering of Pure Spin Currents
• Electronic spin transport in graphene field effect transistors
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• Integration of the Ferromagnetic Insulator EuO onto Graphene
• Interface induced room-temperature ferromagnetism in hydrogenated epitaxial graphene

Cited by in corpus (65)

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• Van der Waals heterostructures for spintronics and opto-spintronics
• Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3
• Opto-Valleytronic Spin Injection in Monolayer MoS2/Few-Layer Graphene Hybrid Spin Valves
• Giant Spin Lifetime Anisotropy in Graphene Induced by Proximity Effects
• Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures
• Van der Waals spin valves
• Large spin relaxation anisotropy and valley-Zeeman spin-orbit coupling in WSe2/Gr/hBN heterostructures
• Electrical and Thermal Generation of Spin Currents by Magnetic Graphene
• Quantum Anomalous Hall Effects in Graphene from Proximity-Induced Uniform and Staggered Spin-Orbit and Exchange Coupling
• Bias induced up to 100% spin-injection and detection polarizations in ferromagnet/bilayer-hBN/graphene/hBN heterostructures
• Magnetic proximity in a van der Waals heterostructure of magnetic insulator and graphene
• Spin Hall effect and Weak Antilocalization in Graphene/Transition Metal Dichalcogenide Heterostructures
• Spin Proximity Effects in Graphene/Topological Insulator Heterostructures
• Magnetoresistance of vertical Co-graphene-NiFe junctions controlled by charge transfer and proximity-induced spin splitting in graphene
• Spin-split band hybridization in graphene proximitized with $\alpha$-RuCl${}_3$ nanosheets
• Large and tunable magnetoresistance in van der Waals Ferromagnet/Semiconductor junctions
• Strong modulation of spin currents in bilayer graphene by static and fluctuating proximity exchange fields
• Spin inversion in graphene spin valves by gate-tunable magnetic proximity effect at one-dimensional contacts
• Strong and Tunable Spin Lifetime Anisotropy in Dual-Gated Bilayer Graphene
• Observation of spin-valley coupling induced large spin lifetime anisotropy in bilayer graphene
• Magnetic-proximity-induced magnetoresistance on topological insulators
• Ferromagnetism in nitrogen doped graphene
• Electrically tunable exchange splitting in bilayer graphene on monolayer Cr${}_2$X${}_2$Te${}_6$ with X=Ge, Si, and Sn
• Dielectrics for Two-Dimensional Transition Metal Dichalcogenide Applications
• Anomalous Hall effect in 2D Dirac materials
• Magnetic Proximity Effect in Pt/CoFe2O4 Bilayers
• Tunable spin-polarized edge currents in proximitized transition metal dichalcogenides
• Gate-tunable proximity effects in graphene on layered magnetic insulators
• Spin caloritronics in a CrBr${}_3$-based magnetic van der Waals heterostructure
• Direct detection of induced magnetic moment and efficient spin-to-charge conversion in graphene/ferromagnetic structures
• Strong interfacial exchange field in a heavy metal/ferromagnetic insulator system determined by spin Hall magnetoresistance
• Engineering Proximity Exchange by Twisting: Reversal of Ferromagnetic and Emergence of Antiferromagnetic Dirac Bands in Graphene/Cr${}_2$Ge${}_2$Te${}_6$
• Bilayer graphene encapsulated within monolayers of WS${}_2$ or Cr${}_2$Ge${}_2$Te${}_6$: Tunable proximity spin-orbit or exchange coupling
• Signatures of van Hove singularities probed by the supercurrent in a graphene - hBN superlattice
• Transport measurements on van der Waals heterostructures under pressure
• Chiral charge pumping in graphene deposited on a magnetic insulator
• Proximity magnetoresistance in graphene induced by magnetic insulators
• Chiral Majorana fermions in graphene from proximity-induced superconductivity
• Ferrimagnetic and antiferromagnetic phase in bilayer graphene nanoflake controlled with external electric fields
• Multifunctional magnetic oxide-MoS${}_2$ heterostructures on silicon
• Towards fully two-dimensional spintronic devices
• Band Gap Opening in Bilayer Graphene-CrCl${}_3$/CrBr${}_3$/CrI${}_3$ van der Waals Interfaces
• Quantum Oscillations of Gilbert Damping in Ferromagnetic/Graphene Bilayer Systems
• Probing Tunneling Spin Injection into Graphene via Bias Dependence
• Ferromagnetic MnSn monolayer epitaxially grown on silicon substrate
• Spin-polarized electric current in silicene nanoribbons induced by atomic adsorption
• Electric-field-induced extremely large change in resistance in graphene ferromagnets
• Modeling the Oblique Spin Precession in Lateral Spin Valves for Accurate Determination of Spin Lifetime Anisotropy: Effect of Finite Contact Resistance and Channel Length
• Spin pumping into two-dimensional electron systems
• Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator
• Robust magnetic proximity induced anomalous Hall effect in a room temperature van der Waals ferromagnetic semiconductor based 2D heterostructure
• Charge-spin conversion signal in WTe2 van der Waals hybrid devices with a geometrical design
• Reversible edge spin currents in antiferromagnetically proximitized dichalcogenides
• Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents
• Klein tunnelling and Hartman effect in graphene junctions with proximity exchange field
• Manipulating Spin-Lattice Coupling in Layered Magnetic Topological Insulator Heterostructure $via$ Interface Engineering
• Probing magnetism via spin dynamics in graphene/2D-ferromagnet heterostructures
• Bias dependent spin injection into graphene on YIG through bilayer hBN tunnel barriers
• Spin-valley coupled thermoelectric energy converter with strained honeycomb lattices
• Magnetoelectric torque and edge currents caused by spin-orbit coupling
• Determining the Proximity Effect Induced Magnetic Moment in Graphene by Polarized Neutron Reflectivity and X-ray Magnetic Circular Dichroism
• Dielectric properties of graphene on transition metal dichalcogenide substrate
• Magnetoelectric torque and edge currents in spin-orbit coupled graphene nanoribbons
• Valley-Polarized Quantum Anomalous Hall Phase in Bilayer Graphene with Layer-Dependent Proximity Effects