POLARIZATION DEPENDENCE OF RESONANT SOFT X-RAY EMISSION SPECTRA IN CeCOMPOUNDS

M. Watanabe, Y. Harada, M. Nakazawa, Y. Ishiwata, R. Eguchi, T. Takeuchi, A. Kotani and S. Shin
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M. Watanabe: RIKEN/SPring-8, Kouto 1-1-1, Mikazuki, Sayo, Hyogo 679-5148, Japan
Y. Harada: RIKEN/SPring-8, Kouto 1-1-1, Mikazuki, Sayo, Hyogo 679-5148, Japan
M. Nakazawa: JASRI/SPring-8, Kouto 1-1-1, Mikazuki, Sayo, Hyogo 679-5198, Japan
Y. Ishiwata: The Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
R. Eguchi: The Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
T. Takeuchi: Faculty of Science, Science University of Tokyo, Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
A. Kotani: The Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
S. Shin: The Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 983-987

Abstract: The electronic structures of Ce compounds have been investigated by means of resonant soft X-ray emission spectroscopy (RXES) excited at resonant energy range of Ce3d → 4fabsorption. Polarization dependence of the RXES shows information on concerning electronic states. InCeO2, the Ce4f → 3dRXES spectra are interpreted as electronic structures hybridized between4f0and$4f^1 \underline{v}$states. Peaks appearing in the spectra are attributed to bonding, nonbonding, and antibonding states between those states, while the spectra ofCeRh3cannot be explained by only using the hybridization between4f0and$4f^1 \underline{v}$states. The spectra have large broad Raman peak, especially when the excitation photon energy is set at satellite of Ce3d → 4fabsorption. We attribute the origin of the broad Raman peak to hybridization states involving electron–hole pairs.

Date: 2002
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DOI: 10.1142/S0218625X02003184

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