Electronic and magnetic properties of intermetallic kagome magnets 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>R</mml:mi><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Sn</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:mo>(</mml:mo><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">Tb</mml:mi><mml:mtext>−</mml:mtext><mml:mi mathvariant="normal">Tm</mml:mi><mml:mo>)</mml:mo></mml:math>

Zhang, Xiaoxiao; Liu, Ziyi; Qi, Caixia; Guo, Qi; Wang, N. N.; Shi, Lifen; Zhang, Hua; Dong, Xianlin; Sun, J. P.; Dun, Zhiling; Cheng, Jinguang

doi:10.1103/physrevmaterials.6.105001

Cited by 28 publications

(9 citation statements)

References 36 publications

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“…This structure hardens anharmonically with decreasing temperature but does not split across T CDW -in line with the other Raman-active modes in ScV 6 Sn 6 including those of A 1g symmetry. Complementary measurements of LuV 6 Sn 6 and YV 6 Sn 6 reveal no low temperature splitting of the 240 cm −1 mode [Supplemental figure 2], consistent with transport results indicating the absence of CDW transitions in the R = Lu and Y analogs 21,23. This again demonstrates that multiplet splitting of the A 1g symmetry mode is a signature of the unusual CDW state in ScV 6 Sn 6 .We quantify these results by fitting the Raman scattering response of ScV 6 Sn 6 with a series of Voigt oscillators and a linear baseline.…”

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confidence: 75%

Origin and stability of the charge density wave in ScV6Sn6

Musfeldt

2023

Preprint

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Kagom′e metals are widely recognized as versatile platforms for exploring novel topological properties, unconventional electronic correlations, magnetic frustration, and superconductivity. In the RV6Sn6 family of materials (R = Sc, Y, Lu), ScV6Sn6 hosts an unusual charge density wave ground state as well as structural similarities with the AV3Sb5 system (A = K, Cs, Rb). In this work, we combine Raman scattering spectroscopy with first-principles lattice dynamics calculations to reveal the charge density wave state in ScV6Sn6. In the low temperature phase, we find a five-fold splitting of the V-containing totally symmetric mode near 240 cm-1 suggesting that the density wave acts to mix modes of P6/mmm and R-3m symmetry - an effect that we quantify by projecting phonons of the high symmetry state onto those of the lower symmetry structure. We also test the stability of the density wave state under compression and find that both physical and chemical pressure act to quench the effect. We discuss these findings in terms of symmetry and the structure-property trends that can be unraveled in this system.

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confidence: 75%

Origin and stability of the charge density wave in ScV6Sn6

Musfeldt

2023

Preprint

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“…Recently, the nonmagnetic T-based R166 including RV 6 Sn 6 , RCo 6 Ge 6 and RCr 6 Ge 6 has also drawn attention. The RV 6 Sn 6 group manifests characteristic kagome band structures including the Dirac cone, saddle point, and flat bands [67-69, [178][179][180][181][182][183]. One interesting observation is a structural modulation with wave-vector (1/3, 1/3, 1/3) in ScV 6 Sn 6 (figure 8) [69-71], suggesting that the charge order might be a common tendency in the partly filled d-orbital kagome systems [184][185][186][187].…”

Section: Discussionmentioning

confidence: 99%

Quantum interactions in topological R166 kagome magnet

Xu,

Yin,

et al. 2023

Rep. Prog. Phys.

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Kagome magnet has been found to be a fertile ground for the search of exotic quantum states in condensed matter. Arising from the unusual geometry, the quantum interactions in the kagome lattice give rise to various quantum states, including the Chern-gapped Dirac fermion, Weyl fermion, flat band and van Hove singularity. Here we review recent advances in the study of the R166 kagome magnet (RT6E6, R = rare earths; T = transition metals; and E = Sn, Ge, etc) whose crystal structure highlights the transition-metal-based kagome lattice and rare-earth sublattice. Compared with other kagome magnets, the R166 family owns the particularly strong interplays between the d electrons on the kagome site and the localized f electrons on the rare-earth site. In the form of spin-orbital coupling, exchange interaction and many-body effect, the quantum interactions play an essential role in the Berry curvature in both the reciprocal and real spaces of R166 family. We discuss the spectroscopic and transport visualization of the topological electrons hosted in the Mn kagome layer of RMn6Sn6 and the various topological effects due to the quantum interactions, including the Chern-gap opening, the exchange-biased effect, the topological Hall effect and the emergent inductance. We hope this work serves as a guide for future explorations of quantum magnets.

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“…Among these compounds, topological Dirac surface states have been identified in GdV 6 Sn 6 and HoV 6 Sn 6 [22,23], YV 6 Sn 6 is claimed to be a topological metal [24]. The electronic and magnetic properties of RV 6 Sn 6 (R = Tb, Dy, Ho, Er, and Tm) have been studied in [25]. Here we focus on the kagome metal ScV 6 Sn 6 , which is the only one showing a CDW transition in RV 6 Sn 6 family so far [3,26], and its non-trivial topology has been studied by angle-resolved photoemission spectroscopy (ARPES) [27,28] and x-ray scattering [29] measurements.…”

Section: Introductionmentioning

confidence: 99%

Quantum oscillations evidence for topological bands in kagome metal ScV₆Sn₆

Zheng,

Zhu,

Mozaffari

et al. 2024

J. Phys.: Condens. Matter

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Metals with kagome lattice provide bulk materials to host both the flat-band and Dirac electronic dispersions. A new family of kagome metals was recently discovered in AV6Sn6. The Dirac electronic structures of this material need strong experimental evidence. In the manuscript, we investigate this problem by resolving the quantum oscillations in both electrical transport and magnetization in ScV6Sn6. The revealed orbits are consistent with the electronic band structure models. Furthermore, the Berry phase of a dominating orbit is revealed to be around π, providing direct evidence for the topological band structure, which is consistent with calculations. Our results demonstrate a rich physics and shed light on the correlated topological ground state of this kagome metal.

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Electronic and magnetic properties of intermetallic kagome magnets RV6Sn6(R=Tb−Tm)

Cited by 28 publications

References 36 publications

Origin and stability of the charge density wave in ScV6Sn6

Origin and stability of the charge density wave in ScV6Sn6

Quantum interactions in topological R166 kagome magnet

Quantum oscillations evidence for topological bands in kagome metal ScV₆Sn₆

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Electronic and magnetic properties of intermetallic kagome magnets RV6Sn6(R=Tb−Tm)

Cited by 28 publications

References 36 publications

Origin and stability of the charge density wave in ScV6Sn6

Origin and stability of the charge density wave in ScV6Sn6

Quantum interactions in topological R166 kagome magnet

Quantum oscillations evidence for topological bands in kagome metal ScV6Sn6

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Product

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Quantum oscillations evidence for topological bands in kagome metal ScV₆Sn₆