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X-ray absorption study of oxygen in the high-Tc superconductor Bi2Sr2CaCu2O8 near the interfaces to Cu, Ag and Au

Qvarford, M. ; Söderholm, S. ; Tjernberg, O. ; Chiaia, G. ; Nylén, H. LU ; Nyholm, R. LU ; Lindau, I. LU ; Karlsson, U. O. and Bernhoff, H. (1996) In Physica C: Superconductivity and its Applications 265(1-2). p.113-120
Abstract

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-O2 layers... (More)

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-O2 layers in Bi2Sr2CaCu2O8.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
keywords
Cu-O planes, Hole concentration, Metal overlayer, Normal state properties, XAFS
in
Physica C: Superconductivity and its Applications
volume
265
issue
1-2
pages
8 pages
publisher
Elsevier
external identifiers
  • scopus:0030195749
ISSN
0921-4534
language
English
LU publication?
yes
id
b9a6c8b2-a6d0-4bee-af18-5f77ec648230
date added to LUP
2016-04-29 10:54:45
date last changed
2025-10-14 10:24:55
@article{b9a6c8b2-a6d0-4bee-af18-5f77ec648230,
  abstract     = {{<p>The influence on O 2p holes in single crystalline Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> 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 Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub>, 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<sub>2</sub> layers in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub>.</p>}},
  author       = {{Qvarford, M. and Söderholm, S. and Tjernberg, O. and Chiaia, G. and Nylén, H. and Nyholm, R. and Lindau, I. and Karlsson, U. O. and Bernhoff, H.}},
  issn         = {{0921-4534}},
  keywords     = {{Cu-O planes; Hole concentration; Metal overlayer; Normal state properties; XAFS}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{1-2}},
  pages        = {{113--120}},
  publisher    = {{Elsevier}},
  series       = {{Physica C: Superconductivity and its Applications}},
  title        = {{X-ray absorption study of oxygen in the high-Tc superconductor Bi2Sr2CaCu2O8 near the interfaces to Cu, Ag and Au}},
  volume       = {{265}},
  year         = {{1996}},
}