Vacancy ordering in the basal plane of YBa/sub 2/Cu/sub 3/O/sub z/
Conference
·
OSTI ID:5312124
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. 4 figs
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5312124
- Report Number(s):
- LBL-24263; CONF-871124-94; ON: DE88004572
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:6040966
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIAGRAMS
ENERGY LEVELS
GROUND STATES
ISING MODEL
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
POINT DEFECTS
SUPERCONDUCTORS
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIAGRAMS
ENERGY LEVELS
GROUND STATES
ISING MODEL
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
POINT DEFECTS
SUPERCONDUCTORS
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES