Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model
Ohashi, Takuma · Suga, Sei-ichiro · Kawakami, Norio · Tsunetsugu, Hirokazu
Original · EN
We study the magnetic properties around the Mott transition in the Kagomé lattice Hubbard model by 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 of the dominant spin fluctuations around the Mott transition. The spin fluctuations in the insulating phase favor 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.
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