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Phys. Rev. Lett. 83, 860 - 863 (1999)

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

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P. Abbamonte1,2 *, C. A. Burns3, E. D. Isaacs2, P. M. Platzman2, L. L. Miller4, S. W. Cheong2, and M. V. Klein1
1Department of Physics, University of Illinois, 1110 W. Green Street, Urbana, Illinois 61801
2Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974
3Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008
4Ames Laboratory, Ames, Iowa 50011

Received 7 October 1998

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 third-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 q-dependent measurements of the charge transfer gap.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.83.860
DOI: 10.1103/PhysRevLett.83.860
PACS: 78.70.Ck, 71.20.-b, 74.25.Jb

* Present address: Solid State Physics Lab, Nijenborgh 4, 9747AG Groningen, The Netherlands.

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