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.
@article{arxiv.cond-mat/0608699,
title = {Magnetic correlations around the Mott transition in the Kagom\'e lattice Hubbard model},
author = {Takuma Ohashi and Sei-ichiro Suga and Norio Kawakami and Hirokazu Tsunetsugu},
journal= {arXiv preprint arXiv:cond-mat/0608699},
year = {2009}
}
Comments
6 pages, 4 figures, accepted for publication in J. Phys. Condens. Matter. (Proceedings of Highly Frustrated Magnetism 2006)