Valence-band photoemission study of single crystalline CeNiSn

Journal Article · Sat Aug 01 04:00:00 EDT 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.58.4426· OSTI ID:641538

Kang, J ^[1]; Olson, C G ^[2]; Inada, Y; Onuki, Y ^[3]; Kwon, S K; Min, B I ^[4]

---

1. Department of Physics, The Catholic University of Korea, Puchon 422-743 (Korea)
2. Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
3. Graduate School of Science, Osaka University, Toyonaka 560 (Japan)
4. 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, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 8 Vol. 58; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM ALLOYS
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
FERMI LEVEL
GROUND STATES
HYBRIDIZATION
MONOCRYSTALS
NICKEL ALLOYS
PHOTOEMISSION
TIN ALLOYS