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Real-space Eliashberg approach to charge order of electrons coupled to dynamic antiferromagnetic fluctuations

机译:真实空间的Eliashberg方法可计算与动态反铁磁涨落耦合的电子的电荷阶数

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摘要

We study charge-ordered solutions for fermions on a square lattice interacting with dynamic antiferromagnetic fluctuations. Our approach is based on real-space Eliashberg equations, which are solved self-consistently. We first show that the antiferromagnetic fluctuations can induce arc features in the spectral functions, as spectral weight is suppressed at the hot spots; however, no real pseudogap is generated. At low temperature, spontaneous charge order with a d-form factor can be stabilized for certain parameters. As long as the interacting Fermi surfaces possess hot spots, the ordering wave vector corresponds to the diagonal connection of the hot spots, similar to the non-self-consistent case. Tendencies towards observed axial order only appear in situations without hot spots.
机译:我们研究与动态反铁磁涨落相互作用的方格上费米子的电荷排序解。我们的方法基于实空间Eliashberg方程,这些方程可以自洽地求解。我们首先表明,反铁磁波动会在光谱函数中引起电弧特征,因为热点处的光谱权重受到抑制。但是,不会生成真正的伪间隙。在低温下,对于某些参数,具有d型因子的自发电荷阶数可以稳定。只要相互作用的费米表面具有热点,则与非自洽情况类似,有序波矢量对应于热点的对角线连接。仅在没有热点的情况下才会出现观察到的轴向顺序趋势。

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