Valence-band photoemission study of single crystalline CeNiSn
- Department of Physics, The Catholic University of Korea, Puchon 422-743 (Korea)
- Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
- Graduate School of Science, Osaka University, Toyonaka 560 (Japan)
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea)
The electronic structure of single crystalline CeNiSn has been investigated using photoemission spectroscopy. The extracted Ce 4f spectrum exhibits three peak structures; the typical Fermi level and 2 eV peaks, and another between them, {approximately}0.9 eV below the Fermi level E{sub F}. The near-E{sub F} peak reflects a substantial Ce 4f-Sn sp hybridization, whereas the 0.9 eV peak arises from the Ce 4f-Ni 3d and Ce 5d-Ni 3d hybridization. A Ni 3d satellite feature is observed about 6 eV below the Ni 3d main band, indicating a strong Ni 3d Coulomb correlation in CeNiSn. The high-resolution photoemission study indicates a finite metallic density of states at E{sub F}, implying a semimetallic ground state. The electronic states near E{sub F} are found to have mixed character from the Sn sp, Ce 5d, Ce 4f, and Ni 3d electrons. Constant-initial-state and constant-final-state yield spectra across the 4d{r_arrow}4f threshold indicate the Ce valence to be close to 3+. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 641538
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 58, Issue 8; Other Information: PBD: Aug 1998
- Country of Publication:
- United States
- Language:
- English
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