Photoemission and oxygen K-edge absorption studies of Ba(Pb,Bi)O/sub 3/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
Photoemission and oxygen K-edge absorption measurements of BaPb/sub 1-//sub x/Bi/sub x/O/sub 3/ have been studied. The valence band of this system is dominated by oxygen 2p states and the density of states at the Fermi level is very low. The O 1s core-level spectrum shows a peak at 529 eV binding energy which is sharper than that in YBa/sub 2/Cu/sub 3/O/sub 7/. Valence-band and core-level features are not significantly changed by Bi substitution in BaPbO/sub 3/, although T/sub c/ increases initially from zero for x = 0.0 to 12 K for x+0.25 and then drops to zero in the vicinity of x = 0.35. Oxygen 2p holes are observed from O K-edge absorption spectra in the Bi-substituted samples, and these spectra are discussed along with those of the copper oxide superconductors. The density of holes is not reduced by further Bi substitution up to x = 0.50 while T/sub c/ is suppressed completely. This behavior is similar to that seen for the Zn-doped YBa/sub 2/Cu/sub 3/O/sub 7/ compounds.
- Research Organization:
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 6237870
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:13; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
BREMSSTRAHLUNG
CHALCOGENIDES
DENSITY
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY LEVELS
ENERGY-LEVEL DENSITY
FERMI LEVEL
HOLES
IONIZING RADIATIONS
LEAD COMPOUNDS
LEAD OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
RADIATIONS
SPECTROSCOPY
SYNCHROTRON RADIATION
X RADIATION
X-RAY SPECTROSCOPY
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
BREMSSTRAHLUNG
CHALCOGENIDES
DENSITY
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY LEVELS
ENERGY-LEVEL DENSITY
FERMI LEVEL
HOLES
IONIZING RADIATIONS
LEAD COMPOUNDS
LEAD OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
RADIATIONS
SPECTROSCOPY
SYNCHROTRON RADIATION
X RADIATION
X-RAY SPECTROSCOPY