  Strange metals arise in a variety of platforms for strongly correlated
electrons, ranging from the cuprates, heavy fermions to flat band systems.
Motivated by recent experiments in kagome metals, we study a Hubbard model on a
kagome lattice whose noninteracting limit contains flat bands. A Kondo lattice
description is constructed, in which the degrees of freedom are exponentially
localized molecular orbitals. We identify an orbital-selective Mott transition
through an extended dynamical mean field theory of the effective model. The
transition describes a quantum critical point at which quasiparticles are lost
and strange metallicity emerges. Our theoretical work opens up a new route for
realizing beyond-Landau quantum criticality and emergent quantum phases that it
nucleates.
