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arXiv 0708.2748cond-mat.str-el
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强关联电荷密度波系统的光学和直流输运性质:无自旋Falicov-Kimball模型有序相动力学平均场论的精确解

Optical and dc transport properties of a strongly correlated charge density wave system: exact solution in the ordered phase of the spinless Falicov-Kimball model with dynamical mean-field theory

O. P. Matveev, A. M. Shvaika, J. K. Freericks

摘要:

导出了二分格点上有序电荷密度波相输运的动力学平均场论方程。将该方法应用于半填充超立方晶格上的无自旋Falicov-Kimball模型。我们确定的多体态密度,直流电荷和热导率,和光导。有序相内的顶点修正继续消失,但态密度和输运系数由于热激活的亚能隙态的快速发展而显示出异常行为。我们还研究了光学求和规则和规则的前三个时刻的格林函数在有序的阶段,看到的总光学光谱重量在有序的阶段要么减少或增加,这取决于相互作用的强度。

英文摘要:

We derive the dynamical mean-field theory equations for transport in an ordered charge-density-wave phase on a bipartite lattice. The formalism is applied to the spinless Falicov-Kimball model on a hypercubic lattice at half filling. We determine the many-body density of states, the dc charge and heat conductivities, and the optical conductivity. Vertex corrections continue to vanish within the ordered phase, but the density of states and the transport coefficients show anomalous behavior due to the rapid development of thermally activated subgap states. We also examine the optical sum rule and sum rules for the first three moments of the Green's functions within the ordered phase and see that the total optical spectral weight in the ordered phase either decreases or increases depending on the strength of the interactions.

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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