Magnetic correlations around the Mott transition in the Kagome lattice Hubbard model

We study the magnetic properties around the Mott transition in the Kagome lattice Hubbard model by using the cellular dynamical mean field theory combined with quantum Monte Carlo simulations. By investigating the q-dependence of the susceptibility, we find a dramatic change in the dominant spin fluctuations around the Mott transition. The spin fluctuations in the insulating phase favour down to the lowest temperature a spatial spin configuration in which antiferromagnetic correlations are strong only in one chain direction but almost vanishing in the others.