Dzyaloshinskii-Moriya Induced Topological Magnon-Phonon Hybridization in 2D Antiferromagnetic Insulators with Tunable Chern Numbers

Abstract

We theoretically study magnon-phonon hybrid excitations (magnon-polarons) in two-dimensional antiferromagnets on a honeycomb lattice. With an in-plane Dzyaloshinskii-Moriya interaction (DMI) allowed from mirror symmetry breaking from phonons, we find non-trivial Berry curvature around the anti-crossing rings among magnon and both optical and acoustic phonon bands, which gives rise to finite Chern numbers. We show that the Chern numbers of the magnon-polaron bands can be manipulated by changing the magnetic field direction or strength. We evaluate the thermal Hall conductivity reflecting the non-trivial Berry curvatures of magnon-polarons and propose a valley Hall effect resulting from spin-induced chiral phonons as a possible experimental signature. Our study complements prior work on magnon-phonon hybridized systems without optical phonons and suggests possible applications in spin caloritronics with topological magnons and chiral phonons.

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Cited by in corpus (20)

• Thermal Hall effects in quantum magnets
• Direct observation of topological magnon polarons in a multiferroic material
• Thermal Hall effect in a van der Waals triangular magnet FeCl2
• Tunable topological magnon-polaron states and anomalous Hall phenomena in two-dimensional ferromagnetic insulators
• Giant spin Nernst effect in a two-dimensional antiferromagnet due to magnetoelastic coupling-induced gaps and interband transitions between magnon-like bands
• Topological magnon gap engineering in van der Waals CrI${}_3$ ferromagnets
• Chiral phonons induced from spin dynamics via magnetoelastic anisotropy
• 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
• Spin and lattice dynamics of a van der Waals antiferromagnet MnPSe${}_3$
• Topological magnon-polaron transport in a bilayer van der Waals magnet
• Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations
• Interlayer Dzyaloshinskii-Moriya interactions induced via non-linear phononics in bilayer van der Waals materials
• Upper branch thermal Hall effect in quantum paramagnets
• Flavor Nernst effects in quantum paramagnets
• Topological characterization of magnon-polaron bands and thermal Hall conductivity in a frustrated kagome antiferromagnet
• Topological transverse spin transport in a canted antiferromagnet/heavy metal heterostructure
• High-accuracy evaluation of non-thermal magnetic states beyond spin-wave theory: applications to higher-energy states
• Band topology and dynamic multiferroicity induced from dynamical Dzyaloshinskii-Moriya interactions in centrosymmetric lattices
• D-Wave Phonon Angular Momentum Texture in Altermagnets by Magnon-Phonon Hybridization