Topological magnon bands in a room temperature Kagome magnet

Abstract

Topological magnon is a vibrant research field gaining more and more attention in the past few years. Among many theoretical proposals and limited experimental studies, ferromagnetic Kagome lattice emerges as one of the most elucidating systems. Here we report neutron scattering studies of YMn6Sn6, a metallic system consisting of ferromagnetic Kagome planes. This system undergoes a commensurate-to-incommensurate antiferromagnetic phase transition upon cooling with the incommensurability along the out-of-plane direction. We observe magnon band gap opening at the symmetry-protected K points and ascribe this feature to the antisymmetric Dzyaloshinskii-Moriya (DM) interactions. Our observation supports the existence of topological Dirac magnons in both the commensurate collinear and incommensurate coplanar magnetic orders, which is further corroborated by symmetry analysis. This finding places YMn6Sn6 as a promising candidate for room-temperature magnon spintronics applications.

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Cited by in corpus (36)

• Topological Magnons: A Review
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• Near-room-temperature giant topological Hall effect in antiferromagnetic kagome metal YMn6Sn6
• In-plane magnetic field induced double fan spin structure with $\text{c}$-axis component in metallic kagome antiferromagnet YMn${}_6$Sn${}_6$
• Interaction-stabilized topological magnon insulator in ferromagnets
• Abundant lattice instability in kagome metal ScV${}_6$Sn${}_6$
• Emergent electromagnetic induction beyond room temperature
• Chiral properties of the zero-field spiral state and field-induced magnetic phases of the itinerant kagome metal YMn${}_6$Sn${}_6$
• Quantum Interactions in Topological R166 Kagome Magnet
• Anomalous Hall effect in distorted kagome magnets (Nd, Sm)Mn${}_6$Sn${}_6$
• Nanoscale visualization and spectral fingerprints of the charge order in ScV6Sn6 distinct from other kagome metals
• Topological magnetic excitations
• Manipulation of Dirac band curvature and momentum-dependent g-factor in a kagome magnet YMn6Sn6
• Quantum Damping of Skyrmion Crystal Eigenmodes due to Spontaneous Quasiparticle Decay
• Unusual magnetic and transport properties in HoMn${}_6$Sn${}_6$ kagome magnet
• Magnon corner states in twisted bilayer honeycomb magnets
• New insight into tuning magnetic phases of $R$Mn${}_6$Sn${}_6$ kagome metals
• Doping control of magnetism and emergent electromagnetic induction in high-temperature helimagnets
• Hybrid topological magnon-phonon modes in honeycomb and kagome lattices
• Effect of magnetism and phonons on localized carriers in the ferrimagnetic kagome metals GdMn${}_6$Sn${}_6$ and TbMn${}_6$Sn${}_6$
• Colossal orbital Zeeman effect driven by tunable spin-Berry curvature in a kagome metal
• Chiral and flat-band magnetic cluster excitations in a ferromagnetic kagome metal
• Hinge Magnons from Non-collinear Magnetic Order in Honeycomb Antiferromagnet
• CrRhAs: a member of a large family of metallic kagome antiferromagnets
• High-field magnetic phase diagrams of the $\text{R}$Mn${}_6$Sn${}_6$ kagome metals
• Magnetoelectric control of spin helicity and nonreciprocal charge transport in a multiferroic metal
• Spin waves and orbital contribution to ferromagnetism in a topological metal
• Topological magnon in exchange frustration driven incommensurate spin spiral of a kagome lattice YMn${}_6$Sn${}_6$
• Quantifying magnetic field driven lattice distortions in kagome metals at the femto-scale using scanning tunneling microscopy
• Diverse Magnetic Phase Diagram and Anomalous Hall Effect in Antiferromagetic LuMn${}_6$Sn${}_6$
• Competing Lattice Instability and Magnetism on the Surface of Kagome Metals
• Effects of exchange distortions in the magnetic Kagome lattice
• Multiple topological corner states in the continuum of extended kagome lattice
• Spin order and excitations in the collinear kagome antiferromagnet Y${}_{0.5}$Fe${}_3$Sn${}_3$
• Multiple topological phases of magnons induced by Dzyaloshinskii-Moriya and pseudodipolar anisotropic exchange interactions in Kagome ferromagnets
• Topological excitations in quasi two-dimensional quantum magnets with weak interlayer interactions