Valence states of bismuth and thallium in superconducting cuprates; A Bi-L sub 3 and Tl-L sub 3 x-ray absorption spectroscopic study

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Modern Physics Letters B; (USA)

DOI:https://doi.org/10.1142/S021798499000057X· OSTI ID:6504353

Vijayakrishnan, V; Kulkarni, G U; Rao, C N.R. ^[1]

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1. Indian Inst. of Science, Bangalore (India). Solid State and Structural Chemistry Unit

Based on a Bi-L{sub 3} edge X-ray absorption spectroscopic study of superconducting bismuth cuprates and model Bi compounds, it is shown that Bi is essentially in the 3{plus} state in the cuprates. Tl-L{sub 3} absorption edge studies a number of thallium cuprate superconductors along with those of model compounds show some evidence for the occupancy of the Tl-5s band, but Tl{sup 3+} is the prepondarant species. Cu K-edge studies of the thallium cuprates show that Cu is essentially in the 2+ state.

• OSTI ID: 6504353
• Journal Information: Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 4:7; ISSN MPLBE; ISSN 0217-9849
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BISMUTH COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM IONS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY SPECTRA