Threshold electronic structure at the oxygen K edge of 3d transition metal oxides: a configuration interaction approach

Details Threshold electronic structure at the oxygen K edge of 3d transition metal oxides: a configuration interaction approach Threshold electronic structure at the oxygen K edge of 3d transition metal oxides: a configuration interaction approach

1999-02-10

arxiv.org/abs/cond-mat/9902132v2

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, submitted to Phys. Rev. B, tried to make a better PS file!

Scientific paper

10.1103/PhysRevB.60.5331

It has been generally accepted that the threshold structure observed in the oxygen K edge X-ray absorption spectrum in 3d transition metal oxides represents the electronic structure of the 3d transition metal. There is, however, no consensus about the correct description. We present an interpretation, which includes both ground state hybridization and electron correlation. It is based on a configuration interaction cluster calculation using a MO6 cluster. The oxygen K edge spectrum is calculated by annihilating a ligand hole in the ground state and is compared to calculations representing inverse photoemission experiments in which a 3d transition metal electron is added. Clear differences are observed related to the amount of ligand hole created in the ground state. Two "rules" connected to this are discussed. Comparison with experimental data of some early transition metal compounds is made and shows that this simple cluster approach explains the experimental features quite well.

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