Phenomenological theory for copper oxide high-Tcsuperconductors
| Autor: | C. H. Eab, I. M. Tang |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Physics
Superconductivity chemistry.chemical_classification Statistics::Theory Copper oxide Statistics::Applications Condensed matter physics Transition temperature Ginzburg landau equation chemistry.chemical_compound Crystallography chemistry Condensed Matter::Superconductivity Phenomenological model Inorganic compound Thallium compounds |
| Zdroj: | Physical Review B. 40:4427-4430 |
| ISSN: | 0163-1829 |
| DOI: | 10.1103/physrevb.40.4427 |
| Popis: | A phenomenological Ginzburg-Landau model for the newly discovered high-${T}_{c}$ superconducting series ${\mathrm{Tl}}_{\mathit{m}}$${\mathrm{Ba}}_{2}$${\mathrm{Ca}}_{\mathit{n}\mathrm{\ensuremath{-}}1}$${\mathrm{Cu}}_{\mathit{n}}$${\mathrm{O}}_{2\mathit{n}+\mathit{m}+2}$ (m=1,2) and ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{Ca}}_{\mathit{n}\mathrm{\ensuremath{-}}1}$${\mathrm{Cu}}_{\mathit{n}}$${\mathrm{O}}_{2\mathit{n}+4}$ is formulated. It is assumed that the order parameters in adjacent CuO layers are coupled through a simple Josephson-effect-like tunneling. By minimizing the free energy, expressions for the transition temperatures of the n-layer superconductors are obtained. Using the published ${T}_{c}$'s of the first members of each series, the ${T}_{c}$'s of the higher members are obtained and are in good agreement with the experimental values. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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