论文标题
电荷循环电流的出现在几何沮丧的哈伯德模型中：功能重新归一化组研究
Emergence of Charge Loop Current in Geometrically Frustrated Hubbard Model: Functional Renormalization Group Study
论文作者
论文摘要
由于奇数顺序参数而引起的自发电流顺序吸引了各种强相关金属的越来越多的注意力。在这里，我们发现了一种基于功能重新归一化组（FRG）理论的新型自旋 - 裂开驱动的电荷回路电流（CLC）机制。目前的机制在简单的沮丧链哈伯德模型中导致了铁CLC顺序。 CLC出现在抗铁磁和$ d $ - 波超导（$ d $ sc）阶段之间。尽管CLC的显微镜起源与$ d $ SC的相似性相似，但CLC过渡温度$ t _ {\ rm clc} $可能高于$ d $ sc One，对于广泛的参数范围。此外，我们揭示了FERRO CLC订单是由前向散射的强大增强$ g_2 $和$ g_4 $驱动的，因为二维基于$ g $ - 学语言。本研究表明，CLC可以以几何挫败感在磁性临界性附近的金属中出现
Spontaneous current orders due to odd-parity order parameters attract increasing attention in various strongly correlated metals. Here, we discover a novel spin-fluctuation-driven charge loop current (cLC) mechanism based on the functional renormalization group (fRG) theory. The present mechanism leads to the ferro-cLC order in a simple frustrated chain Hubbard model. The cLC appears between the antiferromagnetic and $d$-wave superconducting ($d$SC) phases. While the microscopic origin of the cLC has a close similarity to that of the $d$SC, the cLC transition temperature $T_{\rm cLC}$ can be higher than the $d$SC one for wide parameter range. Furthermore, we reveal that the ferro cLC order is driven by the strong enhancement of the forward scatterings $g_2$ and $g_4$ owing to the two dimensionality based on the $g$-ology language. The present study indicates that the cLC can emerge in metals near the magnetic criticality with geometrical frustration
