Orbital-selective Mott phase as a dehybridization fixed point

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

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arXiv · 2203.06140

Orbital-selective Mott phase as a dehybridization fixed point

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

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Abstract

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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Haoyu Hu, Lei Chen, Jian-Xin Zhu, Rong Yu, Qimiao Si. 2022-03-11. Orbital-selective Mott phase as a dehybridization fixed point. https://arxiv.org/abs/2203.06140

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