Jahn–Teller effect in quasi-two-dimensional doped cuprate antiferromagnets and underdoped high-Tc superconductors (Review)
| Autor: | G. G. Sergeeva, A. A. Soroka |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Superconductivity High-temperature superconductivity Physics and Astronomy (miscellaneous) Condensed matter physics Jahn–Teller effect General Physics and Astronomy BCS theory Polaron law.invention Delocalized electron law Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Cuprate Pseudogap |
| Zdroj: | Low Temperature Physics. 30:667-685 |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.1802932 |
| Popis: | The theoretical aspects of research on the role of Jahn–Teller interactions in quasi-two-dimensional cuprate antiferromagnets and high-Tc superconductors (HTSCs) are analyzed. An analysis is made of results that permit one to establish a link between the quasi-two-dimensional character of the properties of underdoped cuprate HTSCs in the normal and superconducting states and the Jahn–Teller (JT) nature of the divalent copper ions. It is shown that the combination of these two features leads to the existence of a pseudogap state. In underdoped cuprate HTSCs with JT lattice distortions the quasi-two-dimensionality gives rise to two-dimensional local and quasilocal states of the charge carriers. This is manifested in substantial temperature dependence of the number of components of the localized and delocalized states of the charge carriers and in repeated dynamical reduction of the dimensionality of underdoped cuprate HTSCs as the temperature is lowered. Such a HTSC, with doping concentrations less than opt... |
| Databáze: | OpenAIRE |
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