Electronic structure of CeNi{sub 1{minus}x}Pd{sub x}Sn and LaMSn (M=Ni,Cu,Pd)

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.7245· OSTI ID:542640

Slebarski, A ^[1]; Jezierski, A ^[2]; Maehl, S; Neumann, M; Borstel, G ^[3]

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1. Institute of Physics, University of Silesia, 40-007 Katowice (Poland)
2. Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznan (Poland)
3. Institute of Physics, University of Osnabrueck, 49069 Osnabrueck (Germany)

The electronic structure of CeNi{sub 1{minus}x}Pd{sub x}Sn has been studied by photoemission spectroscopy. CeNiSn belongs to the class of Kondo insulating materials. The gap formed at the Fermi level is strongly suppressed by substituting Pd for Ni. The x-ray photoemission spectroscopy (XPS) valence band spectra can be compared with {ital ab initio} electronic-structure calculations using the linearized muffin-tin orbital (LMTO) method. We have found a small indirect gap and a low density of states at the Fermi energy for CePdSn. The 3d XPS spectra and LMTO calculations indicate a strong hybridization of the f orbitals with conduction band and the interatomic hybridization which causes the large charge transfer between atoms. We have also observed the correlation between the electronic structure near Fermi energy and the crystallographic properties of the alloyed CeNiSn. We also present the electronic structures of LaNiSn, LaCuSn, and LaPdSn. These compounds are good reference for CeNiSn. At Fermi energy a relatively low density of states is found, for LaCuSn an indirect gap is formed. The metallic samples show a relatively high resistivity at room temperature, the largest for LaCuSn, which demonstrates the influence of the gap on the electric transport properties. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 542640
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 12 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BAND THEORY
BRILLOUIN ZONES
CERIUM ALLOYS
CERIUM COMPOUNDS
COPPER ALLOYS
ELECTRONIC STRUCTURE
ENERGY GAP
FERMI LEVEL
INTERMETALLIC COMPOUNDS
KONDO EFFECT
LANTHANUM ALLOYS
LANTHANUM COMPOUNDS
MUFFIN-TIN POTENTIAL
NICKEL ALLOYS
NICKEL COMPOUNDS
PALLADIUM ALLOYS
PALLADIUM COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
TIN ALLOYS
TIN COMPOUNDS