Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe.

ABSTRACT: The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and the multiple-q charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the electronic modulations, its origin is still unknown and obscured by competing interactions and intertwined orders. Here, we identify a dimerization-driven 2D hexagonal charge-diffuse precursor in the antiferromagnetic kagome metal FeGe and demonstrate that the fraction of dimerized/undimerized states is the relevant order parameter of the multiple-q CDW of a continuous phase transition. The pretransitional charge fluctuations with propagation vector q = q_M at T_CDW < T < T^*(125

SUBMITTER: Subires D 

PROVIDER: S-EPMC12045966 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature