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

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Original languageEnglish
Publication statusPublished - 1 Nov 1987


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.

    Research areas

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

ID: 53340047