Topological phase transition in magnon bands in a honeycomb ferromagnet driven by sublattice symmetry breaking

Abstract

Ferromagnetic honeycomb systems are known to exhibit a magnonic topological phase under the existence of the next-nearest neighbor Dzyaloshinskii-Moriya interaction (DMI). Motivated by the recent progress in the sublattice-specific control of magnetic anisotropy, we study the topological phase of magnon bands of honeycomb ferromagnetic monolayer and bilayer with the sublattice symmetry breaking due to the different anisotropy energy in the presence of the DMI. We show that there is a topological phase transition between the topological magnon insulator and the topologically trivial magnon phase driven by the change of the relative size of the DMI and the anisotropy differences between the sublattices. The magnon thermal Hall conductivity is proposed as an experimental probe of the magnon topology.

8 pages, 5 figures

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Cited by in corpus (13)

• Stacking-dependent topological magnons in bilayer CrI${}_3$
• Cavity magnonics with easy-axis ferromagnet: Critically enhanced magnon squeezing and light-matter interaction
• Tunable magnon topology in monolayer CrI${}_3$ under external stimuli
• Intrinsic Nernst effect of the magnon orbital moment in a honeycomb ferromagnet
• Electric field induced thermal Hall effect of triplons in the quantum dimer magnets $X$CuCl${}_3$ ($X=$ Tl, K)
• Topological paramagnetic excitons of localized f electrons on the honeycomb lattice
• Thermal Hall conductivity of a valence bond solid phase in the square lattice $J_1$-$J_2$ antiferromagnet Heisenberg model with a Dzyaloshinskii-Moriya interaction
• Magnonic Thermal Machines
• Topological switching in bilayer magnons via electrical control
• Topological phases of electrons induced by electron-magnon interactions
• Finite-temperature topological magnons in honeycomb ferromagnets with sublattice asymmetries
• Topological Magnetic Phases and Magnon-Phonon Hybridization in the Presence of Strong Dzyaloshinskii-Moriya Interaction
• Self-consistent renormalized spin-wave theory of magnetic and topological transitions in two-dimensional honeycomb ferromagnets