High-resolution Ce 3d-edge resonant photoemission study of CeNi2

Title
High-resolution Ce 3d-edge resonant photoemission study of CeNi2
Authors
Park, J.G.
Keywords
SPECTRA, SPECTROSCOPIES
Issue Date
2000-05
Publisher
PHYSICAL REVIEW B-CONDENSED MATTER
Abstract
Resonant photoemission (RPES) at the Ce 3d-->4f threshold has been performed for cu-like compound CeNi2 with extremely high energy resolution (full width at half maximum <0.2 eV) to obtain bulk-sensitive 4f spectral weight. The on-resonance spectrum shows a sharp resolution-limited peak near the Fermi energy which can be assigned to the tail of the Kondo resonance. However, the spin-orbit side band around 0.3 eV binding energy corresponding to the f(7/2) peak is washed out, in constrast to the RPES spectrum at the Ce 4d-->4f threshold. This is interpreted as due to the different surface sensitivity, and the bulk-sensitive Ce 3d-->4f RPES spectra are found to be consistent with other electron spectroscopy and low energy properties for alpha-like Ce-transition metal compounds, thus resolving controversy on the interpretation of Ce compound photoemission. The 4f spectral weight over the whole valence band can also be fitted fairly well with the Gunnarsson-Schonhammer calculation of the single impurity Anderson model, but the detailed features show some dependence on the hybridization band shape and the Ce 5d resonant emission.
URI
http://dspace.inha.ac.kr/handle/10505/20173
ISSN
1098-0121
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Journal Papers, Peports(물리학 학술논문, 보고서)
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