Magnetism and charge density wave order in kagome FeGe

Teng, Xiaokun1; Oh, Ji Seop1,2; Tan, Hengxin3; Chen, Lebing1; Huang, Jianwei1; Gao, Bin1; Yin, Jia-Xin4; Chu, Jiun-Haw5; Hashimoto, Makoto6; Lu, Donghui6; Jozwiak, Chris7; Bostwick, Aaron7; Rotenberg, Eli7; Granroth, Garrett E.8; Yan, Binghai3; Birgeneau, Robert J.2,9; Dai, Pengcheng1; Yi, Ming1

2023-03-01

10.1038/s41567-023-01985-w

Nature Physics   Impact Factor & Quartile

1745-2473

1745-2481

["Electron correlations often lead to emergent orders in quantum materials, and one example is the kagome lattice materials where topological states exist in the presence of strong correlations between electrons. This arises from the features of the electronic band structure that are associated with the kagome lattice geometry: flat bands induced by destructive interference of the electronic wavefunctions, topological Dirac crossings and a pair of van Hove singularities. Various correlated electronic phases have been discovered in kagome lattice materials, including magnetism, charge density waves, nematicity and superconductivity. Recently, a charge density wave was discovered in the magnetic kagome FeGe, providing a platform for understanding the interplay between charge order and magnetism in kagome materials. Here we observe all three electronic signatures of the kagome lattice in FeGe using angle-resolved photoemission spectroscopy. The presence of van Hove singularities near the Fermi level is driven by the underlying magnetic exchange splitting. Furthermore, we show spectral evidence for the charge density wave as gaps near the Fermi level. Our observations point to the magnetic interaction-driven band modification resulting in the formation of the charge density wave and indicate an intertwined connection between the emergent magnetism and charge order in this moderately correlated kagome metal.","The observation of band structure features typical of the kagome lattice in FeGe suggests that an interplay of magnetism and electronic correlations determines the physics of this material."]

SCI

English

NI Journal Papers

Others

Gordon and Betty Moore Foundation's EPiQS Initiative[GBMF9470] ; Robert A. Welch Foundation["C-1839","C-2024"] ; U.S. Department of Energy (DOE)[DE-SC0021421] ; U.S. DOE["DE-AC02-05-CH11231","KC2202"] ; U.S. DOE Office of Science User Facilities["DE-AC02-05CH11231","AC02-76SF00515"] ; European Research Council[815869] ; ISF personal research grant[2932/21] ; NSF["DMR-1921798","DMR-1921847"] ; null[US NSF-DMR-2100741]

Physics

Physics, Multidisciplinary

WOS:000948647800001

NATURE PORTFOLIO

Web of Science

1.Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA
2.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
3.Weizmann Inst Sci, Dept Condensed Matter Phys, Rehovot, Israel
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China
5.Univ Washington, Dept Phys, Seattle, WA USA
6.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA USA
7.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA USA
8.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN USA
9.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

Teng, Xiaokun,Oh, Ji Seop,Tan, Hengxin,et al. Magnetism and charge density wave order in kagome FeGe[J]. Nature Physics,2023.

Teng, Xiaokun.,Oh, Ji Seop.,Tan, Hengxin.,Chen, Lebing.,Huang, Jianwei.,...&Yi, Ming.(2023).Magnetism and charge density wave order in kagome FeGe.Nature Physics.

Teng, Xiaokun,et al."Magnetism and charge density wave order in kagome FeGe".Nature Physics (2023).