Polarization and momentum dependence of a charge-transfer excitation in Nd{sub 2}CuO{sub 4}
- Department of Physics, POB 9, FIN-00014 University of Helsinki, (Finland)
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- NSLS, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, (Japan)
- Center for Superconductivity Research, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (United States)
We report the polarization and q dependence of 6-eV charge-transfer excitation in Nd{sub 2}CuO{sub 4}, as studied by resonant inelastic x-ray scattering. The incident polarization is shown to select the intermediate states participating in the resonant process, and resonances associated with 1s{yields}4p{sub {sigma}} and 1s{yields}4p{sub {pi}} transitions are resolved. No enhancement is observed for the 1s3d{sup 10}L well-screened intermediate states in either case. Numerical calculations show that this is the result of nonlocal effects. The intensity and position of the excitation was found to be independent of the momentum transfer along the c axis for q=3.5-7.9 Aa {sup -1}. (c) 2000 The American Physical Society.
- OSTI ID:
- 20215218
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 3 Vol. 61; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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