Core level x-ray photoemission of the high T sub c CaSr sub 2 Bi sub 2 Cu sub 2 O sub x superconductor

Technical Report · Fri Apr 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/7158447· OSTI ID:7158447

Veal, B. W.; Paulikas, A. P.; Downey, J. W.

The x-ray photoemission spectroscopy (XPS) signatures of Cu core levels in CaSr{sub 2}Bi{sub 2}Cu{sub 2}O{sub x} are distinctly different from those of Bi and of Ca in this high {Tc} superconductor. The Cu signatures are very similar to those of Cu in YBa{sub 2}Cu{sub 3}O{sub 6.9}. The Cu 2p spectra, in both cases, indicate that the photoexcited ion has poor (ionic) coupling to screening electrons. In contrast, the spectra of Bi and Ca in CaSr{sub 2}Bi{sub 2}Cu{sub 2}O{sub x} are indicative of good (metallic) coupling between the ion and screening electrons. These observations illuminate the connection between high {Tc} superconductivity and the coupling of Cu ions with conduction electrons. 15 refs., 4 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7158447
• Report Number(s): ANL/PPRNT-90-209; ON: DE90009166
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
EMISSION
IONIZING RADIATIONS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHYSICAL PROPERTIES
RADIATIONS
SECONDARY EMISSION
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
X RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES