Auger Effect in the High-Resolution Ce 3d-edge Resonant Photoemission

Details Auger Effect in the High-Resolution Ce 3d-edge Resonant Photoemission Auger Effect in the High-Resolution Ce 3d-edge Resonant Photoemission

2003-01-14

arxiv.org/abs/cond-mat/0301211v1

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 5 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.67.155107

The bulk-sensitive Ce 4$f$ spectral weights of various Ce compounds including CeFe$_2$, CeNi$_2$, and CeSi$_2$ were obtained with the resonant photoemission technique at the Ce 3d-edge. We found the lineshapes change significantly with the small change of the incident photon energy. Detailed analysis showed that this phenomenon results primarily from the Auger transition between different multiplet states of the Ce $\underline{3d_{5/2}}4f^2$ (bar denotes a hole) electronic configuration in the intermediate state of the resonant process. This tells us that extra care should be taken for the choice of the resonant photon energy when extracting Ce 4$f$ spectral weights from the Ce 3$d$-edge resonant photoemission spectra. The absorption energy corresponding to the lowest multiplet structure of the Ce $\underline{3d_{5/2}}4f^2$ configuration seems to be the logical choice.

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