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Photoemission spectromicroscopy study of a Bi2Sr2CaCu2O8+delta single crystal

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Author

  • M Bertolo
  • A Bianco
  • G Cautero
  • A Goldoni
  • R Larciprete
  • S La Rosa
  • S Lizzit
  • Alexei Zakharov
  • Ingolf Lindau
  • I Vobornik
  • R Yoshizaki
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Summary, in English

Using photoemission spectromicroscopy at sub-micron lateral resolution we studied two superconductor systems of high fundamental and practical importance, such as Bi2Sr2CaCu2O8+delta and MgB2. Our findings demonstrate the importance of considering, for this class of systems, the possible presence of spatial inhomogeneities in interpreting the results of conventional photoemission experiments, which typically probe an area of the order of 1 mm(2). In particular, in the case of MgB2, we report a measured density of states directly comparable to the theoretical predictions, thus rejecting the claim for the existence of strong correlation effects proposed by previous spatially averaged measurements.

Publishing year

2003

Language

English

Pages

487-490

Publication/Series

Journal de Physique IV - Proceedings

Volume

104

Document type

Conference paper

Publisher

EDP Sciences

Topic

  • Natural Sciences
  • Physical Sciences
  • Atom and Molecular Physics and Optics

Conference name

7th International Conference on X-Ray Microscopy

Conference date

2002-07-28 - 2002-08-02

Conference place

ESRF, Grenoble, France

Status

Published

ISBN/ISSN/Other

  • ISSN: 1764-7177
  • ISSN: 1155-4339