BaBiO sub 3 and the effect of potassium substitution using photoemission

Journal Article · Wed Feb 28 23:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.4066· OSTI ID:6926006

Jeon, Y; Liang, G; Chen, J; Croft, M ^[1]; Ruckman, M W; Di Marzio, D ^[2]; Hegde, M S ^[3]

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1. Department of Physics, Rutgers University, Piscataway, New Jersey 08855 (USA)
2. Materials Science Division, Brookhaven National Laboratory, Upton, New York, 11973 (USA)
3. Center for Ceramics Research, Rutgers University, Piscataway, New Jersey 08855 (USA)

The electronic structure and surface stability of BaBiO{sub 3} and Ba{sub 0.6}K{sub 0.4}BiO{sub 3} are studied using photoemission. For BaBiO{sub 3} and Ba{sub 0.6}K{sub 0.4}BiO{sub 3}, bonding and nonbonding valence-band features show good agreement with theoretical calculations reported by Takegahara and Kasuya, and Mattheiss and Hamman, and Hamada {ital et} {ital al}. However, the magnitude of Bi 6{ital s} and O 2{ital p} antibonding states near the Fermi level are less than expected, and the Ba 5{ital p} core levels are at a higher energy than reported by Wertheim {ital et al}. The Bi 5{ital d} core levels show a single component for Ba{sub 0.6}K{sub 0.4}BiO{sub 3} but show two components for BaBiO{sub 3}, and the large shift ({similar to}1.6 eV) of the second component to lower binding energy suggests the possible reduction of surface Bi to the metallic state. Examination of extended x-ray-absorption fine-structure data by Heald {ital et al}., obtained from these materials, show that a weaker Bi-O bond exists in BaBiO{sub 3} than in Ba{sub 0.6}K{sub 0.4}BiO{sub 3}, and this may explain why such bonds are easily broken in BaBiO{sub 3}.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6926006
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:7; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
BREMSSTRAHLUNG
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL DENSITY
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
MASSLESS PARTICLES
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTONS
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
RADIATIONS
SPECTROSCOPY
SUPERCONDUCTORS
SYNCHROTRON RADIATION
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