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Are One-Dimensional Structural Features Essential for Superconductivity at 90K ?

  • Arndt Simon
  • Horst Borrmann
  • Wolfgang Bauhofer
  • Reinhard K. Kremer
  • Hansjuergen Mattausch

Abstract

The crystal structures of the novel high-Tc oxocuprates1,2,3,4 have certain features in common, but also exhibit essential differences. La1.8M0.2CuO4(M=Ba,Sr; Tc ≈ 30 to 40K) contains copper in an average oxidation state +2.2. The coordination octahedron around Cu is tetragonally elongated (d(Cu-O)=190 pm (4x) and 240 pm (2x)). Taking the drastic differences of the Cu-O distances into account, the structure contains CuO2 layers formed from corner-sharing CuO4 squares according to 2 [CuO4/2] which are sandwiched between rigid slabs of composition 2 [(La,M)2O2]. Obviously, the layers are only weakly coupled to the surrounding slabs.

Keywords

Electrical Resistivity Oxygen Removal Valence Fluctuation Valence Bond Theory Coordination Octahedron 
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

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Arndt Simon
    • 1
  • Horst Borrmann
    • 1
  • Wolfgang Bauhofer
    • 1
  • Reinhard K. Kremer
    • 1
  • Hansjuergen Mattausch
    • 1
  1. 1.Max-Planck-Institut fuer FestkoerperforschungStuttgart 80Germany

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