| Autor: |
P.J. Batson, B.L. Henke, Rupert C. C. Perera, D. Berkeland, J.A. Kerner |
| Rok vydání: |
1987 |
| Předmět: |
|
| Zdroj: |
Le Journal de Physique Colloques. 48:C9-1185 |
| ISSN: |
0449-1947 |
| DOI: |
10.1051/jphyscol:19879213 |
| Popis: |
The copper Lα and Lβ x-ray emission spectra from high-Tc Y-Ba-Cu-O superconductors, above and below the critical temperature, have been measured in a laboratory x-ray spectrograph. The Zn-Lα (1011 eV) photon energy was used to produce the Cu-2p1/2,3/2 primary vacancies (binding energies ~950 and 930 eVs, respectively). Changes in Cu-L x-ray emission spectra were observed indicating small changes in population of 3d and 4s electrons in the valence band when superconducting. For comparison Cu-L emission spectra £rom metallic Cu and £rom polycrystalline Cu2O (valence I) and Cu0 (valence II) were recorded at room temperature. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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