Chiral and flat-band magnetic cluster excitations in a ferromagnetic kagome metal

Abstract

TbMn6Sn6 is a metallic ferrimagnet that displays signatures of band topology arising from a combination of uniaxial ferromagnetism and spin-orbit coupling within its Mn kagome layers. Whereas the low energy magnetic excitations can be described as collective spin waves using a local moment Heisenberg model, sharply defined optical and flat-band collective magnon modes are not observed. In their place, we find overdamped chiral and flat-band spin correlations that are localized to hexagonal plaquettes within the kagome layer.

arXiv comment6 pages, 5 figures

References in corpus (38)

• Weyl and Dirac Semimetals in Three Dimensional Solids
• New directions in the pursuit of Majorana fermions in solid state systems
• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Massive Dirac fermions in a ferromagnetic kagome metal
• Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
• Observation of the Magnon Hall Effect
• Dirac fermions and flat bands in the ideal kagome metal FeSn
• Discovery of a quantum limit Chern magnet TbMn6Sn6
• Topological kagome magnets and superconductors
• Time-reversal symmetry-breaking charge order in a kagome superconductor
• Emergent excitations in a geometrically frustrated magnet
• Band touching from real space topology in frustrated hopping models
• Spin chirality on a two-dimensional frustrated lattice
• Novel magnetic states and nematic spin chirality in the kagome lattice metal YMn${}_6$Sn${}_6$
• Bose condensation in flat bands
• Rare earth engineering in RMn${}_6$Sn${}_6$ topological kagome magnets
• A Data Ecosystem to Support Machine Learning in Materials Science
• Higgs mode and its decay in a two dimensional antiferromagnet
• Itinerant magnetic excitations in antiferromagnetic CaFe2As2
• Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet
• Giant anomalous Hall resistivity of the room temperature ferromagnet Fe3Sn2 - a frustrated metal with the kagome-bilayer structure
• Exchange biased Anomalous Hall Effect driven by frustration in a magnetic Kagome lattice
• A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet
• Anisotropically large anomalous and topological Hall effect in a kagome magnet
• Topological magnon bands in a room temperature Kagome magnet
• Spin excitations in metallic kagome lattice FeSn and CoSn
• Magnon crystallization in the kagome lattice antiferromagnet
• Direct observation of the Higgs amplitude mode in a two-dimensional quantum antiferromagnet near the quantum critical point
• Unusual exchange couplings and intermediate temperature Weyl state in Co3Sn2S2
• Damped Dirac magnon in a metallic kagome antiferromagnet FeSn
• Unusual magnetic and transport properties in HoMn${}_6$Sn${}_6$ kagome magnet
• Orbital character of the spin-reorientation transition in TbMn${}_6$Sn${}_6$
• Unconventional Hund Metal in a Weak Itinerant Ferromagnet
• \textit{Ab initio} study on spin fluctuations of itinerant kagome magnet FeSn
• Low temperature competing magnetic energy scales in the topological ferrimagnet TbMn6Sn6
• Spin excitations in the kagome-lattice metallic antiferromagnet Fe${}_{0.89}$Co${}_{0.11}$Sn

Cited by in corpus (8)

• Spin-charge-lattice coupling across the charge density wave transition in a Kagome lattice antiferromagnet
• Persistent flat band splitting and strong selective band renormalization in a kagome magnet thin film
• High-field magnetic phase diagrams of the $\text{R}$Mn${}_6$Sn${}_6$ kagome metals
• Slow ferromagnetic fluctuations in the kagome metal Sc${}_3$Mn${}_3$Al${}_7$Si${}_5$ revealed by ${}^{27}$Al NMR
• Room temperature quantum metric effect in TbMn6Sn6
• Spin order and excitations in the collinear kagome antiferromagnet Y${}_{0.5}$Fe${}_3$Sn${}_3$
• Omnidirectional magnetic imaging of magnetic anisotropy and phase transitions
• Multiple topological phases of magnons induced by Dzyaloshinskii-Moriya and pseudodipolar anisotropic exchange interactions in Kagome ferromagnets