Topological Magnon-Phonon Hybrid Excitations in Two-Dimensional Ferromagnets with Tunable Chern Numbers

Abstract

We theoretically investigate magnon-phonon hybrid excitations in two-dimensional ferromagnets. The bulk bands of hybrid excitations, which are referred to as magnon-polarons, are analytically shown to be topologically nontrivial, possessing finite Chern numbers. We also show that the Chern numbers of magnon-polaron bands and the number of band-crossing lines can be manipulated by an external magnetic field. For experiments, we propose to use the thermal Hall conductivity as a probe of the finite Berry curvatures of magnon-polarons. Our results show that a simple ferromagnet on a square lattice supports topologically nontrivial magnon-polarons, generalizing topological excitations in conventional magnetic systems.

6 pages, 4 figures

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• SU(3) Topology of Magnon-Phonon Hybridization in 2D Antiferromagnets
• Thermal Hall effects in quantum magnets
• Topological Phases in Magnonics
• Topological Phase Transitions of Dirac Magnons in Honeycomb Ferromagnets
• Planar Thermal Hall Effects in Kitaev Spin Liquid Candidate Na2Co2TeO6
• Direct observation of topological magnon polarons in a multiferroic material
• Significant thermal Hall effect in the 3$d$ cobalt Kitaev system $N{a}_{2}C{o}_{2}Te{O}_6$
• Dynamic paramagnon-polarons in altermagnets
• Dissipative Spin-wave Diode and Nonreciprocal Magnonic Amplifier
• Topological Thermal Hall Effect of Magnons in Magnetic Skyrmion Lattice
• Unified bulk semiclassical theory for intrinsic thermal transport and magnetization currents
• Dzyaloshinskii-Moriya Induced Topological Magnon-Phonon Hybridization in 2D Antiferromagnetic Insulators with Tunable Chern Numbers
• Evidence for magnon-phonon coupling in the topological magnet Cu${}_3$TeO${}_6$
• Magnetic field control of topological magnon-polaron bands in two-dimensional ferromagnets
• Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet Mn${}_5$Ge${}_3$
• Magnetoelastic coupling enabled tunability of magnon spin current generation in 2D antiferromagnets
• Thermal Hall effect in a van der Waals triangular magnet FeCl2
• Magnon-Plasmon Hybridization Mediated by Spin-Orbit Interaction in Magnetic Materials
• Hybrid topological magnon-phonon modes in honeycomb and kagome lattices
• Magnetic field-controlled lattice thermal conductivity in MnBi2Te4
• Topological phase transition in magnon bands in a honeycomb ferromagnet driven by sublattice symmetry breaking
• Magnonic Su-Schrieffer-Heeger Model in Honeycomb Ferromagnets
• Tunable topological magnon-polaron states and anomalous Hall phenomena in two-dimensional ferromagnetic insulators
• Thermal Hall effect in a van der Waals ferromagnet CrI3
• Topological spin-plasma waves
• Giant spin Nernst effect in a two-dimensional antiferromagnet due to magnetoelastic coupling-induced gaps and interband transitions between magnon-like bands
• Topological waveguide based on metamaterials of magnetic solitons
• Tunable large spin Nernst effect in a two-dimensional magnetic bilayer
• Magnon Polarons induced by a magnetic field gradient
• Topological magnon gap engineering in van der Waals CrI${}_3$ ferromagnets
• Spin superfluidity in noncollinear antiferromagnets
• Diagonal and off-diagonal thermal conduction with resonant phonon scattering in $N{i}_{3}Te{O}_6$
• Berry curvature for coupled waves of magnons and electromagnetic waves
• Sizable suppression of magnon Hall effect by magnon damping in Cr${}_2$Ge${}_2$Te${}_6$
• Weyl-triplons in SrCu2(BO3)2
• Non-equilibrium dynamics of spin-lattice coupling
• Acousto-magnonic spin Hall effect in honeycomb antiferromagnets
• Intrinsic Magnon Nernst Effects in Pyrochlore Iridate Thin Films
• Coherent strong-coupling of terahertz magnons and phonons in a Van der Waals antiferromagnetic insulator
• Chiral phonons induced from spin dynamics via magnetoelastic anisotropy
• Exchange striction induced thermal Hall effect in van der Waals antiferromagnet MnPS${}_3$
• Topological magnon-polarons in honeycomb antiferromagnets with spin-flop transition
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Large Thermal Hall Effect in MnPS${}_3$
• Topological magnon-polaron transport in a bilayer van der Waals magnet
• Spin and lattice dynamics of a van der Waals antiferromagnet MnPSe${}_3$
• Electric polarization induced by magnons and magnon Nernst effects
• Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations
• Upper branch thermal Hall effect in quantum paramagnets
• Flavor Nernst effects in quantum paramagnets
• High-throughput search for topological magnon materials
• Topological characterization of magnon-polaron bands and thermal Hall conductivity in a frustrated kagome antiferromagnet
• Electronic Manipulation of Magnon Topology by Chirality Injection from Boundaries
• Topological phases of electrons induced by electron-magnon interactions
• Dynamical Orbital Angular Momentum Induced by Circularly Polarized Phonons
• Angular-Dependent Thermal Hall Effect in a Honeycomb Magnet: Disentangling Kitaev and Dzyaloshinskii-Moriya Interactions
• Field-Angle Dependence of Phonon Thermal Hall Effect in Na2X2TeO6 (X = Co, Zn)
• Weyl excitations via helicon-phonon mixing in conducting materials
• Topological excitations in quasi two-dimensional quantum magnets with weak interlayer interactions
• Band topology and dynamic multiferroicity induced from dynamical Dzyaloshinskii-Moriya interactions in centrosymmetric lattices