Electronic Properties and Spin-Correlations of CuO2-Planes in High Temperature Superconductors

  • P. Horsch
  • W. H. Stephan
Chapter
Part of the NATO ASI Series book series (NSSB, volume 213)

Abstract

Considerable insight into the electronic structure and the nature of the charge carriers in high-T c superconductors (HTSC’s) comes from various types of photoemission and inverse photoemission experiments 1 . Such experiments showed that the states close to the Fermi level in the metallic samples have strong oxygen character 2 , i.e. additional holes go essentially on oxygen. By angle resolved photoemission in superconducting Bi 2 CaSr 2 Cu 2 O 8 even a band crossing the Fermi level could be resolved 3 . A Fermi edge has been seen by several groups, which suggests that there is a Fermi liquid which becomes superconducting. A further success of this class of spectroscopies was the observation of the superconducting gap by high-resolution UV-photoemission 4 . The discussion about the precise character of the carriers, however, is still on a qualitative level and controversial. Recent investigations of the O 1s absorption edge 5,6 showed that the relevant oxygen orbitals have 95% p x,y -symmetry, with x and y in the plane 6 .

Keywords

Hubbard Model Charge Density Wave Lanczos Algorithm Fermi Edge Additional Hole 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • P. Horsch
    • 1
  • W. H. Stephan
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 1Federal Republic of Germany

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