Significant Dzyaloshinskii-Moriya Interaction at Graphene-Ferromagnet Interfaces due to Rashba-effect

Abstract

The possibility of utilizing the rich spin-dependent properties of graphene has attracted great attention in pursuit of spintronics advances. The promise of high-speed and low-energy consumption devices motivates a search for layered structures that stabilize chiral spin textures such as topologically protected skyrmions. Here we demonstrate that chiral spin textures are induced at graphene/ferromagnetic metal interfaces. This is unexpected because graphene is a weak spin-orbit coupling material and is generally not expected to induce sufficient Dzyaloshinskii-Moriya interaction to affect magnetic chirality. We demonstrate that graphene induces a new type of Dzyaloshinskii-Moriya interaction due to a Rashba effect. First-principles calculations and experiments using spin-polarized electron microscopy show that this graphene-induced Dzyaloshinskii-Moriya interaction can have similar magnitude as at interfaces with heavy metals. This work paves a new path towards two-dimensional material based spin orbitronics.

21 pages, 4 figures

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• Synthetic chiral magnets promoted by the Dzyaloshinskii-Moriya interaction
• Multiferroic materials based on transition-metal dichalcogenides: Potential platform for reversible control of Dzyaloshinskii-Moriya interaction and skyrmion via electric field
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• From Early Theories of Dzyaloshinskii-Moriya Interactions in Metallic Systems to Today's Novel Roads
• Interfacial Dzyaloshinskii-Moriya Interaction of Antiferromagnetic Materials
• Direct Observation of Unusual Interfacial Dzyaloshinskii-Moriya Interaction in Graphene/NiFe/Ta Heterostructure
• Dzyaloshinskii-Moriya interaction and magnetic skyrmions induced by curvature
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• Reversible control of Dzyaloshinskii-Moriya interaction at graphene/Co interface via hydrogen absorption
• Correlation between the Dzyaloshinskii-Moriya interaction and the orbital angular momentum at an oxide / ferromagnet interface
• Manipulation of magnetic topological textures via perpendicular strain and polarization in van der Waals magnetoelectric heterostructure
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• Applications of Nanomagnets as Dynamical Systems
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• First Principles Calculation of Dzyaloshinskii-Moriya Interaction: A Green's function Approach
• Measuring the Dzyaloshinskii-Moriya interaction of the epitaxial Co/Ir(111) interface
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• Thermally Activated Processes for Ferromagnet Intercalation in Graphene-Heavy Metal Interfaces
• Tuning of the Dzyaloshinskii-Moriya Interaction by He${}^{+}$ ion irradiation
• Intrinsic mixed Bloch-Néel character and chirality switch of skyrmions in asymmetric epitaxial trilayer
• Direct measurement of interfacial Dzyaloshinskii-Moriya interaction at the MoS${}_2$/Ni${}_{80}$Fe${}_{20}$ interface
• Towards Non-Volatile Spin Orbit Devices: Deposition of Ferroelectric Hafnia on Monolayer Graphene/Co/HM Stacks
• Enhancing Perpendicular Magnetic Anisotropy in Garnet Ferrimagnet by Interfacing with Few-Layer WTe2
• In-plane Néel wall chirality and orientation of interfacial Dzyaloshinskii-Moriya vector in magnetic films
• Driving spin chirality by electron dynamics in laser-excited antiferromagnets
• Single-layer graphene on epitaxial FeRh thin films
• Lead-free Hybrid Perovskite: An Efficient Room Temperature Spin Generator via Large Interfacial Rashba effect
• Spin-current driven Dzyaloshinskii-Moriya interaction in the multiferroic BiFeO3 from first-principles
• Dzyaloshinskii-Moriya interaction torques and domain wall dynamics in van der Waals heterostructures
• Evidence of Strong Dzyaloshinskii-Moriya Interaction at the Cobalt/Hexagonal Boron Nitride Interface
• Nature of Interfacial Dzyaloshinskii-Moriya Interactions in Graphene/Co/Pt(111) Multilayer Heterostructures
• An Origin of Dzyaloshinskii-Moriya Interaction at Graphene-Ferromagnet Interfaces Due to the Intralayer RKKY/BR Interaction
• Strain engineering of ferromagnetic-graphene-ferroelectric nanostructures
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• Releasing latent chirality in magnetic two-dimensional materials
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• Asymmetric defect distribution generates bulk Dzyaloshinskii-Moriya interaction in Pt/Co/Pt