Mott-Hubbard and filling-controlled electronic transitions in the layered cuprate oxides
L. Craco
DOI 10.1103/PhysRevB.79.085123 · Physical Review B
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Abstract
We investigate the one-particle spectral properties of La2CuO4. Contrary to conventional wisdom, our dynamical mean-field theory results elucidate the Mott-Hubbard nature of the insulating state in this and related d9 planar compounds. This is shown to be driven by the interplay between covalency and strong local electronic correlations. Good qualitative agreement with photoemission and soft-x-ray absorption is found in the paramagnetic insulating phase. Upon doping, we obtain inhomogeneous charge (electron, hole) responses which are relevant for understanding the evolution of the correlated electronic structure near the filling-controlled insulator-to-metal transition in late transition-metal oxides.
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