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Phys. Rev. B 66, 045106 (2002) [7 pages]

Resonant inelastic x-ray scattering at the lanthanum L3 edge

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L. Journel, J.-M. Mariot, J.-P. Rueff, and C. F. Hague*
Laboratoire de Chimie Physique–Matière et Rayonnement (UMR 7614), Université Pierre et Marie Curie, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France

G. Krill
LURE, Centre Universitaire Paris-Sud, Bât. 209D, B.P. 34, F-91898 Orsay Cedex, France

M. Nakazawa
JASRI, SPring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan

A. Kotani
Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

A. Rogalev and F. Wilhelm
ESRF, 6 rue Jules Horowitz, B.P. 220, F-38043 Grenoble Cedex, France

J.-P. Kappler* and G. Schmerber
IPCMS–GEMM (UMR 7504), Université Louis Pasteur, 23 rue du Loess, F-67037 Strasbourg, France

Received 4 January 2002; published 18 July 2002

Pre-edge structure, not resolved in La L3 x-ray-absorption spectra, has been observed in LaS and in two La-Ni intermetallics using resonant inelastic x-ray scattering (RIXS). The 2p3d RIXS data were successfully simulated using a schematic representation of the densities of unoccupied states. It is concluded that the pre-edge structure is largely dominated by dipole transitions involving hybridized 4f states. No such hybridization occurs for LaF3. In this case multiplet calculations performed within an atomic model clearly indicate that pre-edge structure observed in both the x-ray-absorption spectrum and the 2p3d RIXS data originates from quadrupole transitions.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.045106
DOI:
10.1103/PhysRevB.66.045106
PACS:
78.70.En, 78.70.Ck, 78.70.Dm

*Also at LURE.