Magnon dispersion in bilayers of two-dimensional ferromagnets

Abstract

We determine magnon spectra of an atomic bilayer magnet with ferromagnetic intra- and both ferro- and anti- ferromagnetic interlayer coupling. Analytic expressions for the full magnon band of the latter case reveal that both exchange interactions govern the fundamental magnon gap. The inter and intralayer magnetic ordering are not independent: the intralayer ferromagnetism stabilizes antiferromagnetic inter-layer order. The topology of these exchange-anisotropy spin models without spin-orbit interaction turns out to be trivial.

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Cited by in corpus (5)

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• Topological phase transition in magnon bands in a honeycomb ferromagnet driven by sublattice symmetry breaking
• Spin waves in the bilayer van der Waals magnet CrSBr
• Orbital angular momentum and current-induced motion of a Skyrmion-textured domain wall in a ferromagnetic nanotube
• Spin-wave theory in a randomly disordered lattice: A Heisenberg ferromagnet