Soluble kagome Ising model in a magnetic field

被引：16

作者：

Lu, WT ^{[1
]}

Wu, FY

机构：

[1] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[2] Northeastern Univ, Elect Mat Res Inst, Boston, MA 02115 USA

来源：

PHYSICAL REVIEW E | 2005年 / 71卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevE.71.046120

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

An Ising model on the kagome lattice with superexchange interactions is solved exactly under the presence of a nonzero external magnetic field. The model generalizes the superexchange model introduced by Fisher in 1960 and is analyzed in light of a free-fermion model. We deduce the critical condition and present detailed analyses of its thermodynamic and magnetic properties. The system is found to exhibit a second-order transition with logarithmic singularities at criticality.

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页数：8

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