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X-ray absorption study of oxygen in the high-T-c superconductor Bi2Sr2CaCu2O8 near the interfaces to Cu, Ag and Au
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1996 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 265, no 1-2, 113-120 p.Article in journal (Refereed) Published
Abstract [en]

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.
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Natural Sciences
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URN: urn:nbn:se:kth:diva-84812DOI: 10.1016/0921-4534(96)00274-2ISI: A1996UX64400016OAI: oai:DiVA.org:kth-84812DiVA: diva2:499652
Note
NR 20140805Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2017-12-07Bibliographically approved

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