Vacancy ordering in the basal plane of YBa2Cu3O(sub)z

L. T. Wille, A. Berera, D. Defontaine, S. C. Moss

Research output: Contribution to conferencePaperpeer-review


The ordering in the Cu-O basal plane of the high T sub c superconductor YBa sub 2 Cu sub 3 O sub z is investigated. Asymmetric pairwise interactions between nearest and next nearest neighbors are assumed. Ordering instabilities in two-dimensional k-space are mapped out as a function of the interactions and the ordered ground state superstructures consisting of occupied and empty oxygen sites are determined. A temperature-composition phase diagram is calculated by means of the Cluster Variation Method. The thermodynamic behavior of the superconducting compound is discussed in the light of these results.
Original languageEnglish
Publication statusPublished - 1 Nov 1987


  • Barium Oxides
  • Copper Oxides
  • Phase Diagrams
  • Superconductors
  • Thermodynamics
  • Voids
  • Yttrium Oxides
  • Ground State
  • Oxygen


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