Spin excitations in the kagome-lattice metallic antiferromagnet 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">Fe</mml:mi><mml:mrow><mml:mn>0.89</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Co</mml:mi><mml:mrow><mml:mn>0.11</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">Sn</mml:mi></mml:math>

Xie, Tao; Yin, Qiangwei; Wang, Qi; Kolesnikov, A. I.; Granroth, G. E.; Abernathy, D. L.; Gong, Dongliang; Lei, Hechang; Podlesnyak, A.

doi:10.1103/physrevb.106.214436

Cited by 5 publications

(2 citation statements)

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“…However, the strong damping observed at low temperatures and high energies (above the phonon cutoff) would be inconsistent with these mechanisms. Rather, the damping observed in TbMn 6 Sn 6 and other FM kagome metals, such as YMn 6 Sn 6 24 and FeSn 25 – 27 , is more consistent with the Landau damping caused by the decay of magnons into particle-hole excitations (Stoner excitations). Recent ab initio calculations for FeSn are consistent with heavy Landau damping for magnons above 80 meV 50 .…”

Section: Discussionmentioning

confidence: 69%

“…Recent INS studies of a variety of FM kagome metals, such as FeSn 15 – 18 , Fe 3 Sn 2 19 – 21 , and TbMn 6 Sn 6 22 , 23 , reveal well-defined and collective acoustic magnon modes at low energies. However, the higher-energy optical and flat band magnon modes and their associated topological features were obscured by heavy damping 22 , 24 – 27 . Here, we perform experiments on much larger sample volumes and with increased incident neutron energies that reveal two broad, high-energy excitations in TbMn 6 Sn 6 that are better described as localized magnetic quasiparticles, rather than collective magnon modes.…”

Section: Introductionmentioning

confidence: 99%

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Chiral and flat-band magnetic quasiparticles in ferromagnetic and metallic kagome layers

Riberolles,

Slade,

Han

et al. 2024

Nat Commun

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Magnetic kagome metals are a promising platform to develop unique quantum transport and optical phenomena caused by the interplay between topological electronic bands, strong correlations, and magnetic order. This interplay may result in exotic quasiparticles that describe the coupled electronic and spin excitations on the frustrated kagome lattice. Here, we observe novel elementary magnetic excitations within the ferromagnetic Mn kagome layers in TbMn6Sn6 using inelastic neutron scattering. We observe sharp, collective acoustic magnons and identify flat-band magnons that are localized to a hexagonal plaquette due to the special geometry of the kagome layer. Surprisingly, we observe another type of elementary magnetic excitation; a chiral magnetic quasiparticle that is also localized on a hexagonal plaquette. The short lifetime of localized flat-band and chiral quasiparticles suggest that they are hybrid excitations that decay into electronic states.

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Section: Discussionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Chiral and flat-band magnetic quasiparticles in ferromagnetic and metallic kagome layers

Riberolles,

Slade,

Han

et al. 2024

Nat Commun

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Magnetic anisotropy and magnetic phase diagram of a kagome antiferromagnet Fe1-Co Sn

Park,

Cho,

You

et al. 2024

Journal of Alloys and Compounds

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Electronic band structures of topological kagome materials

Li 李,

Ma 马,

Lou 娄

et al. 2024

Chinese Phys. B

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The kagome lattice has garnered significant attention due to its ability to host quantum spin Fermi liquid states. Recently, the combination of unique lattice geometry, electron-electron correlations, and adjustable magnetism in solid kagome materials has led to the discovery of numerous fascinating quantum properties. These include unconventional superconductivity, charge and spin density waves (CDW/SDW), pair density waves (PDW), and Chern insulator phases. These emergent states are closely associated with the distinctive characteristics of the kagome lattice's electronic structure, such as van Hove singularities, Dirac fermions, and flat bands, which can exhibit exotic quasi-particle excitations under different symmetries and magnetic conditions. Recently, various quantum kagome materials have been developed, typically consisting of kagome layers stacked along the $z$-axis with atoms either filling the geometric centers of the kagome lattice or embedded between the layers. In this topical review, we begin by introducing the fundamental properties of several kagome materials. To gain an in-depth understanding of the relationship between topology and correlation, we then discuss the complex phenomena observed in these systems. These include the simplest kagome metal $T_3X$, kagome intercalation metal $TX$, and the ternary compounds $AT_6X_6$ and $RT_3X_5$ ($A$ = Li, Mg, Ca, or rare earth; $T$ = V, Cr, Mn, Fe, Co, Ni; $X$ = Sn, Ge; $R$ = K, Rb, Cs). Finally, we provide a perspective on future experimental work in this field.

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Spin excitations in the kagome-lattice metallic antiferromagnet Fe0.89Co0.11Sn

Abstract: Spin excitations in the kagome-lattice metallic antiferromagnet math xmlns="http://www.w3.org/1998/Math/MathML">msub>mi mathvariant="normal">Fe/mi>mrow>mn>0.89/mn>/mro w>/msub>msub>mi mathvariant="normal">Co /mi>mrow>mn>0.11/mn>/mrow>/msub>mi mathvariant="normal">Sn/mi>/math>

Cited by 5 publications

References 55 publications

Chiral and flat-band magnetic quasiparticles in ferromagnetic and metallic kagome layers

Chiral and flat-band magnetic quasiparticles in ferromagnetic and metallic kagome layers

Magnetic anisotropy and magnetic phase diagram of a kagome antiferromagnet Fe1-Co Sn

Electronic band structures of topological kagome materials

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