Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals
arXiv:1812.11125 · doi:10.1103/PhysRevLett.122.187203
Abstract
Antiferromagnetic skyrmion crystals are magnetic phases predicted to exist in antiferromagnets with Dzyaloshinskii-Moriya interactions. Their spatially periodic noncollinear magnetic texture gives rise to topological bulk magnon bands characterized by nonzero Chern numbers. We find topologically-protected chiral magnonic edge states over a wide range of magnetic fields and Dzyaloshinskii-Moriya interaction values. Moreover, and of particular importance for experimental realizations, edge states appear at the lowest possible energies, namely, within the first bulk magnon gap. Thus, antiferromagnetic skyrmion crystals show great promise as novel platforms for topological magnonics.
5 pages, 5 figures
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Cited by in corpus (12)
- Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings
- Chiral Magnonic Edge States in Ferromagnetic Skyrmion Crystals Controlled by Magnetic Fields
- Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators
- Skyrmion crystal and spiral phases in centrosymmetric bilayer magnets with staggered Dzyaloshinskii-Moriya interaction
- Topological magnetic excitations
- Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
- Skyrmion Based Magnonic Crystals
- Tunable Strong Magnetic Anisotropy in Two-Dimensional van der Waals Antiferromagnets
- Magnon Polarons induced by a magnetic field gradient
- Collective excitations in chiral Stoner magnets
- Complex magnetism of the two-dimensional antiferromagnetic Ge2F: from a Néel spin-texture to a potential antiferromagnetic skyrmion
- Enhanced Stability of Antiferromagnetic Skyrmion during Its Motion by Anisotropic Dzyaloshinskii Moriya Interaction