Electronic properties of normal and extended Hubbard model for bilayer cuprates

L. Craco ()
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L. Craco: Federal University of Mato Grosso

The European Physical Journal B: Condensed Matter and Complex Systems, 2022, vol. 95, issue 8, 1-8

Abstract: Abstract Using dynamical mean-field theory we explore the electronic properties of the bilayer Hubbard model. For realistic model parameters we find a large reduction of the bonding-antibonding splitting of pure and hole doped Bi $$_2$$ 2 Sr $$_2$$ 2 CaCu $$_2$$ 2 O $$_{8 +\delta }$$ 8 + δ bilayer superconductor due to sizable dynamical correlations. Our results reveal a remarkable layer-selective renormalization of the Cu-3d bands caused by the interplay of intralayer Coulomb interaction and layer polarization with emergent Landau–Fermi liquid electronic excitations. At finite repulsive interlayer Coulomb interaction we predict a continuous layer decoupling phenomenon with coexisting Landau–Fermi liquid and Mott localized electrons. The emergence of layer-selectivity is important for the ongoing debate of correlated two-fluid superconductivity. Graphical abstract

Date: 2022
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DOI: 10.1140/epjb/s10051-022-00393-y

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