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arXiv 0812.1764cond-mat.str-elcond-mat.mes-hall
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Mott跃迁与二维可积晶格模型

Mott transition and integrable lattice models in two dimensions

Federico L. Bottesi, Guillermo R. Zemba

摘要:

我们描述了二维莫特过渡的Hubbard模型与最近的邻居相互作用的基础上最近的解决方案Zamolodchikov四面体方程,扩展的概念,可积性的二维晶格系统。在Mott转变时,我们发现系统处于一个d密度波或交错通量相,可以用对称性为\su 2 \otimes \su 2的双Chern Simons有效理论来描述. Mott转变具有拓扑性质,其特征是反铁磁阵列中出现的涡旋与电荷强烈相互作用,并具有电磁对偶性。我们还考虑了小掺杂对这个理论的影响,并表明它导致了量子气液共存相,这属于伊辛普适性类,这是符合几个实验观察。

英文摘要:

We describe the two-dimensional Mott transition in a Hubbard-like model with nearest neighbors interactions based on a recent solution to the Zamolodchikov tetrahedron equation, which extends the notion of integrability to two-dimensional lattice systems. At the Mott transition, we find that the system is in a d-density wave or staggered flux phase that can be described by a double Chern Simons effective theory with symmetry \su2 \otimes \su2. The Mott transition is of topological nature, characterized by the emergence of vortices in antiferromagnetic arrays interacting strongly with the electric charges and an electric-magnetic duality. We also consider the effect of small doping on this theory and show that it leads to a quantum gas-liquid coexistence phase, which belongs to the Ising universality class and which is consistent with several experimental observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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