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

Takuma Ohashi·Sei-ichiro Suga·Norio Kawakami·Hirokazu Tsunetsugu
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Abstract

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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Takuma Ohashi, Sei-ichiro Suga, Norio Kawakami, Hirokazu Tsunetsugu. 2006-08-31. Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model. https://doi.org/10.1088/0953-8984%2F19%2F14%2F145251

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