Polarization and momentum dependence of a charge-transfer excitation in Nd2CuO4

K. Hämäläinen, J. P. Hill, S. Huotari, C.-C. Kao, L. E. Berman, A. Kotani, T. Idé, J. L. Peng, and R. L. Greene
Phys. Rev. B 61, 1836 – Published 15 January 2000
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Abstract

We report the polarization and q dependence of 6-eV charge-transfer excitation in Nd2CuO4, 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 1s4pσ and 1s4pπ transitions are resolved. No enhancement is observed for the 1s¯3d10L¯ 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=3.57.9Å1.

  • Received 10 June 1999

DOI:https://doi.org/10.1103/PhysRevB.61.1836

©2000 American Physical Society

Authors & Affiliations

K. Hämäläinen

  • Department of Physics, POB 9, FIN-00014 University of Helsinki, Finland

J. P. Hill

  • Department of Physics, Brookhaven National Laboratory, Upton, New York 11973

S. Huotari

  • Department of Physics, POB 9, FIN-00014 University of Helsinki, Finland

C.-C. Kao and L. E. Berman

  • NSLS, Brookhaven National Laboratory, Upton, New York 11973

A. Kotani and T. Idé

  • Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan

J. L. Peng and R. L. Greene

  • Center for Superconductivity Research, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742

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Vol. 61, Iss. 3 — 15 January 2000

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