On the structural phase transition temperature in La2−x(Sr,Ba)xCuO4−y: Its dependence on pressure, doping concentration, and oxygen deficiency
| Autor: | T. Lægreid, K. Fossheim, Wu Ting |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
chemistry.chemical_classification
High-temperature superconductivity Field (physics) Strain (chemistry) Stereochemistry Chemistry Transition temperature Doping Thermodynamics General Chemistry Condensed Matter Physics law.invention law Impurity Materials Chemistry Chemical composition Inorganic compound |
| Zdroj: | Solid State Communications. 80:47-50 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/0038-1098(91)90596-n |
| Popis: | The pressure dependence of the structural phase transition (SPT) temperature in La2−x(Sr,Ba)xCuO4−y compounds is phenomenologically ascribed to the coupling between strain field and structural order parameter. The influence of partial substitution of La by Sr or Ba and of oxygen deficiency on the SPT temperature is suggested to be physically equivalent to applying a strain field to the pure La2CuO4. Quantitative agreement with experimental observations is obtained by using a Landau free energy which includes the coupling energy between strain field and order parameter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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