Tunability of charge density wave in a magnetic kagome metal

Abstract

The discovery of the charge density wave order (CDW) within a magnetically ordered phase in the kagome lattice FeGe has provided a promising platform to investigate intertwined degrees of freedom in kagome lattices. Recently, a method based on post-annealing has been suggested to manipulate the CDW order in kagome FeGe towards either long-range or suppressed orders. Here, we provide a comprehensive comparison of the experimentally measured electronic structures of FeGe crystals that have undergone different post-annealing procedures and demonstrate the remarkable effectiveness on tuning the CDW gap without strong perturbation on the underlying electronic structure. Moreover, we observe an additional low temperature transition that only appears in crystals with a long-range CDW order, which we associate with a lattice-spin coupled order. Our work indicates a likely strong sensitivity of the CDW order to disorder in FeGe, and provides evidence for strong coupling between the electronic, lattice, and spin degrees of freedom in this kagome magnet.

References in corpus (30)

• Theory of Intertwined Orders in High Temperature Superconductors
• Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
• Cascade of correlated electron states in a kagome superconductor CsV3Sb5
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Superconductivity in the ${\mathbb{Z}}_2$ kagome metal KV${}_3$Sb${}_5$
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Analysis of Charge Order in the Kagome Metal $A$V${}_3$Sb${}_5$ ($A=$K,Rb,Cs)
• Discovery of charge density wave in a correlated kagome lattice antiferromagnet
• Quantum phases driven by strong correlations
• Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors
• Intertwined magnetism and charge density wave order in kagome FeGe
• Nodeless electron pairing in CsV${}_3$Sb${}_5$-derived kagome superconductors
• Discovery of charge order and corresponding edge state in kagome magnet FeGe
• Microscopic evidence for anisotropic multigap superconductivity in the CsV${}_3$Sb${}_5$ kagome superconductor
• Charge order landscape and competition with superconductivity in kagome metals
• Spin-phonon coupling driven Charge density wave in a Kagome Magnet
• Testing Electron-phonon Coupling for the Superconductivity in Kagome Metal $\mathrm{Cs}{\mathrm{V}}_3\mathrm{S}{\mathrm{b}}_5$
• Quantum Interactions in Topological R166 Kagome Magnet
• Charge-$4e$ superconductivity from nematic superconductors in 2D and 3D
• Enhanced Spin-polarization via Partial Ge1-dimerization as the Driving Force of the 2$\times$2$\times$2 CDW in FeGe
• Annealing-tunable charge density wave in the kagome antiferromagnet FeGe
• Electronic Landscape of Kagome Superconductors $\text{A}$V${}_3$Sb${}_5$ ($\text{A}$ = K, Rb, Cs) from Angle-Resolved Photoemission Spectroscopy
• Competing itinerant and local spin interactions in kagome metal FeGe
• Intriguing Low-Temperature Phase in the Antiferromagnetic Kagome Metal FeGe
• Annealing-induced long-range charge density wave order in magnetic kagome FeGe: fluctuations and disordered structure
• Complex magnetic and spatial symmetry breaking from correlations in kagome flat bands
• 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
• Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe
• Disordered charge density waves in the kagome metal FeGe
• Vacancy-induced suppression of CDW order and its impact on magnetic order in kagome antiferromagnet FeGe

Cited by in corpus (5)

• Spin Excitations and Flat Electronic Bands in a Cr-based Kagome Superconductor
• Kagome metals
• Coherent Phonon Pairs and Rotational Symmetry Breaking of Charge Density Wave Order in the Kagome Superconductor CsV${}_3$Sb${}_5$
• Interacting spin and charge density waves in kagome metal FeGe
• Thermoelectric evidence of the electronic structure changes from the charge-density-wave transition in FeGe