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

Details Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model

2006-08-31

arxiv.org/abs/cond-mat/0608699v1

J. Phys.: Cond. Matt., 19, 145251 (2007).

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 4 figures, accepted for publication in J. Phys. Condens. Matter. (Proceedings of Highly Frustrated Magnetism 2006)

Scientific paper

10.1088/0953-8984/19/14/145251

We study the magnetic properties around the Mott transition in the Kagom\'e 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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