  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.
