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Motivated by the recent discovery of unconventional charge order, we developa theory of electronically mediated charge density wave formation in the familyof kagome metals $A$V$_3$Sb$_5$ ($A=$K,Rb,Cs). The intertwining of van Hovefilling and sublattice interference suggests a three-fold charge density waveinstability at T$_{\text{CDW}}$. From there, the charge order forming belowT$_{\text{CDW}}$ can unfold into a variety of phases capable of exhibitingorbital currents and nematicity. We develop a Ginzburg Landau formalism tostake out the parameter space of kagome charge order. We find a nematic chiralcharge order to be energetically preferred, which shows tentative agreementwith experimental evidence.

Analysis of Charge Order in the Kagome Metal $A$V$_3$Sb$_5$ ($A=$K,Rb,Cs)