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Fig. 1. (Color online) (a) Evolution of the hybridization function Im[Δ(ω)] by tuning the on-site interaction U for the Bethe lattice with half-filling. There exist a phase transition from the metallic to the insulating state (increasing U, Uc22.9), as well as from the insulating to the metallic state (decreasing U, Uc12.3). (b) Quasiparticle weight with data from DMFT-NRG. The blue(black) line represents the phase transition from the metallic(insulating) to the insulating(metallic) state, and the green lines shows the phase transition points measured by the quasiparticle weight.
New Phys.: Sae Mulli 2022;72:487~494