Local correlations and hole doping in NiO: a dynamical mean field study

Details Local correlations and hole doping in NiO: a dynamical mean field study Local correlations and hole doping in NiO: a dynamical mean field study

2006-12-05

arxiv.org/abs/cond-mat/0612116v2

Phys. Rev. B 75, 165115 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

Using a combination of {\it ab initio} bandstructure methods and dynamical mean-field theory we study the single-particle spectrum of the prototypical charge-transfer insulator NiO. Good agreement with photoemission and inverse-photoemission spectra is obtained for both stoichiometric and hole-doped systems. In spite of a large Ni-$d$ spectral weight at the top of the valence band the doped holes are found to occupy mainly the ligand $p$ orbitals. Moreover, high hole doping leads to a significant reconstruction of the single-particle spectrum accompanied by a filling of the correlation gap.

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