Concepedia

Preparation of Bi<sub>4</sub>(Sr, Ca)<sub>6</sub>Cu<sub>4</sub>O<sub>16+x</sub>surfaces for photoemission studies by in situ oxygen annealing

Wendy R. Flavell, John Hampson, C Neeson, Richard J. D. Tilley

Superconductor Science and Technology · 1989 · 11 citations · 19 references

DOI

Concepts

Abstract

Clean surfaces of ceramic samples of the oxide superconductors Bi4(Sr, Ca)6Cu4O16+x have been prepared in a UHV system by in situ annealing under pure oxygen at atmospheric pressure. Ultraviolet photoemission spectra from the oxygen-annealed surfaces are similar to those from cleaved single crystal material, and show a small but measurable density of states at the Fermi energy. Core level photoemission spectra are presented and discussed.

References

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