Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides

Details Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides

1998-10-08

arxiv.org/abs/cond-mat/9810095v2

Physics

Condensed Matter

Strongly Correlated Electrons

minor notational changes, discussion of anderson impurity model fixed, references added; accepted by PRL

Scientific paper

10.1103/PhysRevLett.83.860

We report resonant inelastic x-ray measurements of insulating La$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$ taken with the incident energy tuned near the Cu K absorption edge. We show that the spectra are well described in a shakeup picture in 3rd order perturbation theory which exhibits both incoming and outgoing resonances, and demonstrate how to extract a spectral function from the raw data. We conclude by showing {\bf q}-dependent measurements of the charge transfer gap.

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