We report resonant inelastic x-ray measurements of insulating La2CuO4 and Sr2CuO2Cl2 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.
@article{arxiv.cond-mat/9810095,
title = {Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides},
author = {P. Abbamonte and C. A. Burns and E. D. Isaacs and P. M. Platzman and L. L. Miller and S. W. Cheong and M. V. Klein},
journal= {arXiv preprint arXiv:cond-mat/9810095},
year = {2009}
}
Comments
minor notational changes, discussion of anderson impurity model fixed, references added; accepted by PRL