Coupled lattice and electronic effects in high-temperature superconductors
| Autor: | A.R Bishop, M.I Salkola, S.A Trugman |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Superconducting coherence length
Physics Superconductivity High-temperature superconductivity Condensed matter physics Mechanical Engineering Fermi level Metals and Alloys BCS theory Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention symbols.namesake Mechanics of Materials law Lattice (order) Pairing Materials Chemistry symbols Electronic band structure |
| Zdroj: | Synthetic Metals. 71:1543-1546 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/0379-6779(94)02946-v |
| Popis: | Summary form only given. Accumulating data for oxide superconductors which become superconducting at high temperatures continues to point to the strong involvement of (particularly local and dynamic) structural distortion. At the same time, recent band structure calculations suggest that almost crossing electronic bands occur near the Fermi level. It is likely that these two characteristics are closely connected. Here, we : (i) Briefly review some of the evidence for the above characteristics ; (ii) Point out some similarities with perovskite and other martensitic materials, which also show distinctive percursor microstructure; (iii) Present a generalized BCS theory which includes band crossing and hybridization effects, and accounts for a multiphonon pairing mechanism; (iv) Analyze a local polaronic model for dynamic hole motion which can reconcile observations of double well Cu-O bond distributions and nonadiabatic optical spectroscopy features. |
| Databáze: | OpenAIRE |
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