Optical Spectra of Superconducting YBa 2 Cu 3 O 7-δ Films: Evidence for Cu ++ d-d Transitions
| Autor: | H.C. Li, G. Linker, G. Scheiber, W. Assmus, J. Geerk, W. Weber, H. P. Geserich |
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| Rok vydání: | 1988 |
| Předmět: |
chemistry.chemical_classification
Superconductivity High-temperature superconductivity Materials science Condensed matter physics Band gap business.industry General Physics and Astronomy Infrared spectroscopy law.invention Optics chemistry Transition metal law Thin film Absorption (electromagnetic radiation) business Inorganic compound |
| Zdroj: | Europhysics Letters (EPL). 6:277-282 |
| ISSN: | 1286-4854 0295-5075 |
| DOI: | 10.1209/0295-5075/6/3/015 |
| Popis: | Thin films of superconducting YBa2Cu3O7-δ (Tc ≈ 90 K), deposited on Al2O3, have been used to study reflection and absorption from 0.15 to 6 eV. Values for charge transfer gaps are found near 4 and 5 eV. In the weak-absorption region below 4 eV there appear broad maxima near 0.6, 1.5 and 3 eV–very similar to the well-known d-d transitions in the magnetic oxides of the 3d transition metals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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