Discovery of charge density wave in a correlated kagome lattice antiferromagnet

Abstract

A hallmark of strongly correlated quantum materials is the rich phase diagram resulting from competing and intertwined phases with nearly degenerate ground state energies. A well-known example is the copper oxides, where a charge density wave (CDW) is ordered well above and strongly coupled to the magnetic order to form spin-charge separated stripes that compete with superconductivity. Recently, such rich phase diagrams have also been revealed in correlated topological materials. In two-dimensional kagome lattice metals consisting of corner-sharing triangles, the geometry of the lattice can produce flat bands with localized electrons, non-trivial topology, chiral magnetic order, superconductivity and CDW order. While CDW has been found in weakly electron correlated nonmagnetic AV3Sb5 (A = K, Rb, Cs), it has not yet been observed in correlated magnetic ordered kagome lattice metals. Here we report the discovery of CDW within the antiferromagnetic (AFM) ordered phase of kagome lattice FeGe. The CDW in FeGe occurs at wavevectors identical to that of AV3Sb5, enhances the AFM ordered moment, and induces an emergent anomalous Hall effect. Our findings suggest that CDW in FeGe arises from the combination of electron correlations-driven AFM order and van Hove singularities-driven instability possibly associated with a chiral flux phase, in stark contrast to strongly correlated copper oxides and nickelates, where the CDW precedes or accompanies the magnetic order.

36 pages, 4 figures in main text

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Cited by in corpus (144)

• Topological kagome magnets and superconductors
• Intertwined magnetism and charge density wave order in kagome FeGe
• Quantum states and intertwining phases in kagome materials
• Discovery of charge order and corresponding edge state in kagome magnet FeGe
• Softening of a flat phonon mode in the kagome ScV${}_6$Sn${}_6$
• Topological Quantum Materials with Kagome Lattice
• Competing charge-density wave instabilities in the kagome metal ScV${}_6$Sn${}_6$
• Abundant lattice instability in kagome metal ScV${}_6$Sn${}_6$
• Spin-phonon coupling driven Charge density wave in a Kagome Magnet
• Observation of Flat Band, Dirac Nodal Lines and Topological Surface States in Kagome Superconductor CsTi${}_3$Bi${}_5$
• Optical spectroscopy and band structure calculations of structural phase transition in the Vanadium-based kagome metal ScV${}_6$Sn${}_6$
• Flat band separation and robust spin-Berry curvature in bilayer kagome metals
• Control of chiral orbital currents in a colossal magnetoresistance material
• Highly anisotropic magnetism in the vanadium-based kagome metal TbV6Sn6
• Quantum Interactions in Topological R166 Kagome Magnet
• Theory of nematic charge orders in kagome metals
• Intertwining of magnetism and charge ordering in kagome FeGe
• Enhanced Spin-polarization via Partial Ge1-dimerization as the Driving Force of the 2$\times$2$\times$2 CDW in FeGe
• Observation of the dual quantum spin Hall insulator by density-tuned correlations in a van der Waals monolayer
• Annealing-tunable charge density wave in the kagome antiferromagnet FeGe
• Nanoscale visualization and spectral fingerprints of the charge order in ScV6Sn6 distinct from other kagome metals
• Coupled topological flat and wide bands: Quasiparticle formation and destruction
• Correlated Electronic Structure and Incipient Flat Bands of the Kagome Superconductor CsCr3Sb5
• Novel three-dimensional Fermi surface and electron-correlation-induced charge density wave in FeGe
• Quantum oscillations revealing topological band in kagome metal ScV6Sn6
• Dynamics and Resilience of the Charge Density Wave in a bilayer kagome metal
• Magnetic interactions and possible structural distortion in kagome FeGe from first-principles study and symmetry analysis
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• Realization of a two-dimensional checkerboard lattice in monolayer Cu${}_2$N
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• Emergent flat band and topological Kondo semimetal driven by orbital-selective correlations
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• Charge Density Wave and Ferromagnetism in Intercalated CrSBr
• Electronic properties and phase transition in Kagome metal, Yb0.5Co3Ge3
• Observation of flat and weakly dispersing bands in a van der Waals semiconductor Nb3Br8 with breathing kagome lattice
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• Origin and stability of the charge density wave in ScV${}_6$Sn${}_6$
• Spin-charge-lattice coupling across the charge density wave transition in a Kagome lattice antiferromagnet
• Annealing-induced long-range charge density wave order in magnetic kagome FeGe: fluctuations and disordered structure
• Anisotropic magnetism and band evolution induced by ferromagnetic phase transition in titanium-based kagome ferromagnet SmTi3Bi4
• Observation of Flat Bands and Dirac Cones in a Pyrochlore Lattice Superconductor
• Absence of $E_{2g}$ nematic instability and dominant $A_{1g}$ response in the kagome metal CsV${}_3$Sb${}_5$
• Symmetry breaking and ascending in the magnetic kagome metal FeGe
• Charge order above room-temperature in a prototypical kagome superconductor La(Ru${}_{1-x}$Fe${}_x$)${}_3$Si${}_2$
• YbV${}_3$Sb${}_4$ and EuV${}_3$Sb${}_4$, vanadium-based kagome metals with Yb${}^{2+}$ and Eu${}^{2+}$ zig-zag chains
• Complex magnetic and spatial symmetry breaking from correlations in kagome flat bands
• Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4
• Visualizing symmetry-breaking electronic orders in epitaxial Kagome magnet FeSn films
• Atomic-Scale Visualization of a Cascade of Magnetic Orders in the Layered Antiferromagnet $GdT{e}_3$
• Spin Excitations and Flat Electronic Bands in a Cr-based Kagome Superconductor
• FeGe as a building block for the kagome 1:1, 1:6:6, and 1:3:5 families: hidden d-orbital decoupling of flat band sectors, effective models and interaction Hamiltonians
• Kagome metals
• Persistent flat band splitting and strong selective band renormalization in a kagome magnet thin film
• Kagome Materials I: SG 191, ScV${}_6$Sn${}_6$. Flat Phonon Soft Modes and Unconventional CDW Formation: Microscopic and Effective Theory
• Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe
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• Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe
• Orbital-selective effect of spin reorientation on the Dirac fermions in a non-charge-ordered kagome ferromagnet Fe${}_3$Ge
• Chiral Broken Symmetry Descendants of the Kagomé Lattice Chiral Spin Liquid
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• Magnetotransport properties in van-der-Waals \textit{\textbf{R}}Te${}_3$ (\textit{\textbf{R}} = La, Ce, Tb)
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• Spectroscopic origin of giant anomalous Hall effect in an interwoven magnetic kagome metal
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• Tunability of charge density wave in a magnetic kagome metal
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• Perspective: imaging atomic step geometry to determine surface terminations of kagome materials and beyond
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• Disordered charge density waves in the kagome metal FeGe
• Unraveling the origin of Kondo-like behavior in the 3$d$-electron heavy-fermion compound YFe${}_2$Ge${}_2$
• Anomalous Electrical Transport in the Kagome Magnet YbFe${}_6$Ge${}_6$
• Orbital-selective charge-density wave in TaTe${}_4$
• Nanoscale visualization of the thermally-driven evolution of antiferromagnetic domains in FeTe thin films
• Intriguing kagome topological materials
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• Exotic charge density waves and superconductivity on the Kagome Lattice
• Higher-Order Van Hove Singularities in Kagome Topological Bands
• Coexistence of Dirac fermion and charge density wave in square-net-based semimetal LaAuSb2
• Electronic Correlation Effects on Stabilizing a Perfect Kagome Lattice and Ferromagnetic Fluctuation in LaRu${}_3$Si${}_2$
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• Origin of competing charge density waves in kagome metal ScV${}_6$Sn${}_6$
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• Tunable bifurcation of magnetic anisotropy and bi-oriented antiferromagnetic order in kagome metal GdTi3Bi4
• Lattice dynamics study of electron-correlation-induced charge density wave in antiferromagnetic kagome metal FeGe
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• Interplay of Charge Density Wave and Magnetism on the Kagomé Lattice
• Breathing-Driven Metal-Insulator Transition in Correlated Kagome Systems
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• Jahn-Teller-like Distortion in a One-dimensional π-Conjugated Polymer
• Successive orthorhombic distortions in kagome metals by molecular orbital formation
• A Quieter State of Charge -- Ultra-Low-Noise Collective Current in Charge-Density-Wave Nanowires
• Double-layer Kagome Metals Pt3Tl2 and Pt3In2
• Room temperature charge density wave in a tetragonal polymorph of Gd2Os3Si5 and study of its origin in the RE2T3X5 (RE = Rare earth, T = transition metal, X = Si, Ge) series
• Unconventional spin transport in strongly correlated kagome systems
• Topological Aspects of Dirac Fermions in a Kagomé Lattice
• Correlation between Complex Spin Textures and the Magnetocaloric and Hall Effects in Eu(Ga${}_{1-x}$Al${}_x$)${}_4$ ($x$ = 0.9, 1)
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• Origin of the charge density wave state in BaFe${}_2$Al${}_9$
• Weak low-temperature ferromagnetism and linear magnetoresistance in Lu${}_{0.75}$Fe${}_6$Sn${}_6$ with a disordered HfFe${}_6$Ge${}_6$-type structure
• Anomalous Nernst Effect and Its Implications for Time-Reversal Symmetry Breaking in Kagome Metal ScV6Sn6
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• Magnetism of kagome metals $\left({\text{Fe}}_{1-x}{\text{Co}}_x\right)\text{Sn}$ studied by $\mu$SR
• Tunable topological phase in 2D ScV${}_6$Sn${}_6$ kagome material
• Beyond kagome: $p$-bands in kagome metals
• Kekulé order from diffuse nesting near higher-order Van Hove points
• Dichotomy of flat bands in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Strain-tunable anomalous Hall effect in hexagonal MnTe
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• Altermagnetism in an interacting model of Kagome materials
• Competing charge density wave phases in YNiC2
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• Kagome edge states under lattice termination, spin-orbit coupling, and magnetic order
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• Vacancy Order and Physical Properties of a Ternary Compound Fe0.68Pd0.80Te with an α-Fe1+xTe-Type Structure