Mott transition in two-dimensional frustrated compounds
Mott transition in two-dimensional frustrated compounds
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DOI：
10.1103/physrevb.79.195108
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发表时间：
2009-03
影响因子：
3.7
通讯作者：
A. Liebsch;H. Ishida;J. Merino
中科院分区：
文献类型：
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作者：
A. Liebsch;H. Ishida;J. Merino
在簇动态平均场理论中评估具有局部库仑相互作用的各向同性和各向异性三角晶格的相图。由于各向异性晶格中的部分几何挫败，短程相关性被证明会引起重入行为，而这在完全挫败的各向同性极限中是不存在的。包括临界温度在内的相图的定性特征与层状有机电荷转移盐 kappa-(BEDT-TTF)_2Cu[N(CN)_2]Cl 和 kappa-(BEDT-TTF)_2Cu_2(CN)_3 的实验数据非常一致。
The phase diagrams of isotropic and anisotropic triangular lattices with local Coulomb interactions are evaluated within cluster dynamical mean field theory. As a result of partial geometric frustration in the anisotropic lattice, short range correlations are shown to give rise to reentrant behavior which is absent in the fully frustrated isotropic limit. The qualitative features of the phase diagrams including the critical temperatures are in good agreement with experimental data for the layered organic charge transfer salts kappa-(BEDT-TTF)_2Cu[N(CN)_2]Cl and kappa-(BEDT-TTF)_2Cu_2(CN)_3.