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arXiv 2203.06140cond-mat.str-elcond-mat.supr-con
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轨道选择性Mott相作为去杂交固定点

Orbital-selective Mott phase as a dehybridization fixed point

Haoyu Hu, Lei Chen, Jian-Xin Zhu, Rong Yu, Qimiao Si

摘要:

铁基超导体及相关强关联系统的研究主要集中在接近反铁磁序的坏金属正常态。一个轨道选择性莫特相(OSMP)已被广泛讨论作为锚定的轨道选择性相关现象在这一制度。最近的实验的动机,我们提出的概念,OSMP是同义词相关驱动的去杂交。这个想法是在轨道间跳跃和动态空间自旋相关之间的竞争。从扩展的动力学平均场论(EDMFT)中产生的有效模型,并使用连续时间量子蒙特卡罗和分析方法相结合,我们展示了如何OSMP出现作为一个稳定的去杂交不动点。同时,证明了OSMP的稳定性。这种机制与其他强关联金属中的部分定域-离域跃迁的联系进行了讨论。

英文摘要:

Studies on the iron-based superconductors and related strongly correlated systems have focused attention on bad-metal normal state in proximity to antiferromagnetic order. An orbital-selective Mott phase (OSMP) has been extensively discussed as anchoring the orbital-selective correlation phenomena in this regime. Motivated by recent experiments, we advance the notion that an OSMP is synonymous to correlation-driven dehybridization. This idea is developed in terms of a competition between inter-orbital hopping and dynamical spatial spin correlations. Within effective models that arise from extended dynamical mean-field theory (EDMFT), and using a combination of continuous-time quantum Monte Carlo and analytical methods, we show how the OSMP emerges as a stable dehybridization fixed point. Concomitantly, the stability of the OSMP is demonstrated. Connections of this mechanism with partial localization-delocalization transition in other strongly correlated metals are discussed.

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