Determination of valence of Cu in superconducting La/sub 2-//sub x/(Sr,Ba)/sub x/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The measurement of Cu K-edge x-ray absorption near-edge structure of monovalent, divalent, and trivalent copper oxides has been used to identify the presence of different valence of copper in the La/sub 2-//sub x/(Sr,Ba)/sub x/CuO/sub 4/ (x = 0.0--0.3) system. The results indicate the coexistence of Cu II and Cu III states in these compounds. Theoretical calculations based on a cluster of CuO/sub 4/O/sub 2/La/sub 8/LaSr predict the presence of nearly degenerate electronic ground states representing nominally Cu II and Cu III configurations.
- Research Organization:
- Argonne National Laboratory, Argonne, Illinois 60439
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6655987
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:13; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
X-ray-absorption near-edge-structure study of La/sub 2-//sub x/(Ba,Sr)/sub x/CuO/sub 4-//sub y/ superconductors
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Thu Oct 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6252578
Copper K-edge X-ray absorption studies of La{sub 2-x}K{sub x}CuO{sub 4} superconductors, Ba{sub 4}NaCuO{sub 4}(CO{sub 3}){sub 2}, and NdCu{sub 2}O{sub 4}
Journal Article
·
Wed Apr 23 00:00:00 EDT 1997
· Inorganic Chemistry
·
OSTI ID:518418
Cu K -edge x-ray-absorption near-edge structure and electronic structure of Nd sub 2 minus x Ce sub x CuO sub 4 minus y and La sub 2 minus x Sr sub x CuO sub 4
Journal Article
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Sun Dec 31 23:00:00 EST 1989
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6910352
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ALLOYS
BARIUM ADDITIONS
BARIUM ALLOYS
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM ADDITIONS
STRONTIUM ALLOYS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X-RAY SPECTRA
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ALLOYS
BARIUM ADDITIONS
BARIUM ALLOYS
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM ADDITIONS
STRONTIUM ALLOYS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X-RAY SPECTRA