| Autor: |
Zetterer, T., Ose, W., Schützmann, J., Otto, H. H., Obermayer, P. E., Tasler, N., Lengfellner, H., Lugert, G., Keller, J., Renk, K. F. |
| Zdroj: |
Journal of the Optical Society of America B: Optical Physics; March 1989, Vol. 6 Issue: 3 p420-435, 16p |
| Abstrakt: |
We report on a study of single-phase (superconducting) YBa_2Cu_3O_7 and (nonconducting) Y_2BaCuO_5 and mixed phases of these compounds in bulk and film samples and on an investigation of ceramic bulk material of the homologous series Tl_2Ba_2CanCun_+1O_2n_+6. We describe preparation and structural characterization by x-ray diffraction analyses and further characterization by electric, magnetic, tunnel junction, and Raman scattering studies, and we present results of far-infrared reflectivity measurements. In a theoretical analysis we relate the phonon structure of reflectivity spectra to geometric structure of a metallic network, with holes filled with nonconducting material. The influence of superconductivity on reflectivity is also investigated. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
