Quantum Anomalous Hall effect in graphene coupled to skyrmions

Abstract

Skyrmions are topologically protected spin textures, characterized by a topological winding number N , that occur spontaneously in some magnetic materials. Recent experiments have demonstrated the capability to grow graphene on top Fe/Ir, a system that exhibits a two dimensional Skyrmion lattice. Here we show that a weak exchange coupling between the Dirac electrons in graphene and a two dimensional Skyrmion lattice with $N=\pm 1$ drives graphene into a quantum anomalous Hall phase, with a band-gap in bulk, a Chern number $\mathcal{C}=2N$ and chiral edge states with perfect quantization of conductance $G=2N\frac{e^2}{h}$ . Our findings imply that the topological properties of the Skyrmion lattice can be imprinted in the Dirac electrons of graphene.

7 pages, 7 figures

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Cited by in corpus (21)

• Topological Phases in Two-Dimensional Materials: A Brief Review
• Magnetic bimerons as skyrmion analogues in in-plane magnets
• Topological spin waves in the atomic-scale magnetic skyrmion crystal
• Topological Nernst effect of the two-dimensional skyrmion lattice
• Dimensional Crossover Induced Topological Hall Effect in a Magnetic Topological Insulator
• Unconventional Topological Hall Effect in Skyrmion Crystals Caused by the Topology of the Lattice
• Large Anomalous Nernst Effect in a Skyrmion Crystal
• Magnetoelectric effect and orbital magnetization in skyrmion crystals: Detection and characterization of skyrmions
• Giant proximity exchange and flat Chern band in 2D magnet-semiconductor heterostructures
• Ferromagnetic helical nodal line and Kane-Mele spin-orbit coupling in kagome metal Fe3Sn2
• Transverse Transport in Two-Dimensional Relativistic Systems with Non-Trivial Spin Textures
• The family of topological Hall effects for electrons in skyrmion crystals
• Signatures of lattice geometry in quantum and topological Hall effect
• Microscopic Theory of Ultrafast Skyrmion Excitation by Light
• Magnetic skyrmion crystal at a topological insulator surface
• Resonant optical topological Hall conductivity from skyrmions
• High Figure of Merit Magneto Optics from Interfacial Skyrmions on Topological Insulators
• Valley selecting current partition at zero-line mode of quantum anomalous Hall topologies
• Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
• Electrical Detection of Individual Skyrmions in Graphene Devices
• Emergent quantum matter in graphene nanoribbons