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The newly discovered kagome metals AV$_3$Sb$_5$ (A = K, Rb, Cs) offer anexciting route to study exotic phases arising due to interplay betweenelectronic correlations and topology. Besides superconductivity, thesematerials exhibit a charge-density wave (CDW) phase occurring at around 100 K,whose origin still remains elusive. The robust multi-component $2 \times 2$ CDWphase in these systems is of great interest due to the presence of an unusuallylarge anomalous Hall effect. In quasi-2D systems with weak inter-layer couplingfluctuation driven exotic phases may appear. In particular in systems withmulti-component order parameters fluctuations may lead to establishment ofcomposite order when only products of individual order parameters condensewhile the individual ones themselves remain disordered. We argue that suchfluctuation-driven regime of composite CDW order may exist in thin films ofkagome metals above the CDW transition temperature. It is suggested that themelting of the Trihexagonal state in the material doped way from the van Hovesingularities gives rise to a pseudogap regime where the spectral weight isconcentrated in small pockets and most of the original Fermi surface is gapped.Our findings suggest possible presence of exotic phases in the weakly coupledlayered kagome metals, more so in the newly synthesized thin films of kagomemetals.

Charge-density wave fluctuation driven composite order in the layered Kagome Metals