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

被引：7
|
作者：
Ohashi, T. [1 ]
Suga, S.-i.
Kawakami, N.
Tsunetsugu, H.
机构：
[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan
[2] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2007年 / 19卷 / 14期
关键词：
D O I：
10.1088/0953-8984/19/14/145251
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
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.
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页数：6
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