Motivated by the heavy fermion Fermi liquid (HFFL) features observed at low-$T$ in the pyrochlore $LiV_{ 2}O_{ 4}$, we consider a material-specific model that includes aspects of the local quantum chemistry, the geometrically frustrated lattice structure, and strong correlations in a { \it single} approach. In particular, we show how geometrical frustration (GF) gives rise to a crossover scale, $T^{ *}<<J$, the intersite (AF) exchange, below which the metallic system shows HFFL features. Our scenario is a specific realization of the importance of GF effects in driving HFFL behavior in $LiV_{ 2}O_{ 4}$, and provides a natural understanding of various puzzling features observed experimentally.
Categories: cond-mat.str-el