Inhomogeneity of the pseudogap state of a doped layered cuprate antiferromagnet
| Autor: | G. G. Sergeeva |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Condensed Matter::Quantum Gases
Superconductivity Physics High-temperature superconductivity Physics and Astronomy (miscellaneous) Condensed matter physics Jahn–Teller effect General Physics and Astronomy Polaron law.invention law Condensed Matter::Superconductivity Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Cuprate Charge carrier Pseudogap |
| Zdroj: | Low Temperature Physics. 29:895-900 |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.1614233 |
| Popis: | The features of the pseudogap state in doped layered cuprate antiferromagnets and underdoped high-Tc superconductors (HTSCs) are investigated. It is shown that the transition to the pseudogap state is a dimensional crossover from three-dimensional motion to two-dimensional motion of charges in the copper–oxygen planes, which leads to the coexistence of light charge carriers and Jahn–Teller polarons and to the development of strong local correlations, as are characteristic for two-dimensional doped Mott–Hubbard insulators. In a doped antiferromagnet the d-wave pairing of light charge carriers and Jahn–Teller polarons leads to the formation of magnetic and bosonic clusters, i.e., substantial inhomogeneity of the copper–oxygen planes arises. It is found that the change in the properties of a doped layered cuprate antiferromagnetic insulator and in the metallic and superconducting states of an underdoped HTSC with decreasing temperature is due to a repeated dynamic reduction of their dimensionality. A model p... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|