Magnetic correlations in the Hubbard model on triangular and kagome lattices

In order to study the magnetic properties of frustrated metallic systems, we present, for the first time, quantum Monte Carlo data on the magnetic susceptibility of the Hubbard model on triangular and kagome lattices. We show that the underlying lattice structure determines the nature and the doping dependence of the magnetic fluctuations. In particular, in the doped kagome case we find strong short-range magnetic correlations, which makes the metallic kagome systems a promising field for studies of superconductivity.