The interplay of Dzyaloshinskii-Moriya and Kitaev interactions for magnonic properties of Heisenberg-Kitaev honeycomb ferromagnets

Abstract

The properties of Kitaev materials are attracting ever increasing attention owing to their exotic properties. In realistic two-dimensional materials, Kitaev interaction is often accompanied by the Dzyloshinskii-Moriya interaction, which poses a challenge of distinguishing their magnitude separately. In this work, we demonstrate that it can be done by accessing magnonic transport properties. By studying honeycomb ferromagnets exhibiting Dzyaloshinskii-Moriya and Kitaev interactions simultaneously, we reveal non-trivial magnonic topological properties accompanied by intricate magnonic transport characteristics as given by thermal Hall and magnon Nernst effects. We also investigate the effect of a magnetic field, showing that it does not only break the symmetry of the system but also brings drastic modifications to magnonic topological transport properties, which serve as hallmarks of the relative strength of anisotropic exchange interactions. Based on our findings, we suggest strategies to estimate the importance of Kitaev interactions in real materials.

arXiv comment6 pages, 4 figures

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• Stacking-dependent topological magnons in bilayer CrI${}_3$
• Magnon corner states in twisted bilayer honeycomb magnets
• Tunable magnon topology in monolayer CrI${}_3$ under external stimuli
• Flavor-wave theory with quasiparticle damping at finite temperatures: Application to chiral edge modes in the Kitaev model
• Topological magnon gap engineering in van der Waals CrI${}_3$ ferromagnets
• Thermal Hall effect incorporating magnon damping in localized spin systems
• Toroidal magnetic molecules stripped to their basics
• Intrinsic Nernst effect of the magnon orbital moment in a honeycomb ferromagnet
• Dynamics of fractionalized mean-field theories: consequences for Kitaev materials
• Kitaev-Heisenberg model on the star lattice: From chiral Majorana fermions to chiral triplons
• Sign Changes in Heat, Spin, and Orbital Magnon Transport Coefficients in Kitaev Ferromagnets
• Topological magnons in Kitaev magnets with finite Dzyaloshinskii-Moriya interaction at high field
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Intrinsic Spin Nernst Effect and Chiral Edge Modes in van der Waals Ferromagnetic Insulators: Dzyaloshinskii-Moriya vs. Kitaev Interactions
• Angular-Dependent Thermal Hall Effect in a Honeycomb Magnet: Disentangling Kitaev and Dzyaloshinskii-Moriya Interactions
• Multiple topological phases of magnons induced by Dzyaloshinskii-Moriya and pseudodipolar anisotropic exchange interactions in Kagome ferromagnets