X-ray absorption study of oxygen in the high-T-c superconductor Bi2Sr2CaCu2O8 near the interfaces to Cu, Ag and Au
1996 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, Vol. 265, no 1-2, 113-120 p.Article in journal (Refereed) Published
The influence on O 2p holes in single crystalline Bi2Sr2CaCu2O8 upon the interface formation to Cu, Ag and Au has been studied by O K edge X-ray absorption measurements. It was found that Cu reduces the amount of doping induced O 2p holes significantly in the vicinity of the interface, whereas Ag and Au gave a much smaller reduction of these states. Photoemission spectra confirmed previous;findings that Cu causes a strong chemical reaction at the Bi-O surface of Bi2Sr2CaCu2O8, in contrast to Ag and Au which induced only a minimal reaction. The results support the opinion that the Bi-O layers are essential for the doping of the Cu-O-2 layers in Bi2Sr2CaCu2O8.
Place, publisher, year, edition, pages
1996. Vol. 265, no 1-2, 113-120 p.
IdentifiersURN: urn:nbn:se:kth:diva-84812DOI: 10.1016/0921-4534(96)00274-2ISI: A1996UX64400016OAI: oai:DiVA.org:kth-84812DiVA: diva2:499652
NR 201408052012-02-132012-02-132012-02-13Bibliographically approved