R. Zalecki, Andrzej Kolodziejczyk, Wolfgang T. König, Gerhard Gritzner,
"Photoemission electronic states of Tl-1223 and Bi-2223 superconductors"
, in Acta Physica Polonica A, Vol. 98, Nummer 5, 12-2000, ISSN: 0587-4246, Photoemission electronic states of Tl-1223 and Bi-2223 superconductors, R. Zalecki, A. Kolodziejczyk, W. König and G. Gritzner, Acta Phys. Polon., A 98 (2000) 513 - 524, ISSN 0587-4246
Original Titel:
Photoemission electronic states of Tl-1223 and Bi-2223 superconductors
Sprache des Titels:
Englisch
Original Kurzfassung:
X-ray Photoemission Spectra (XPS) from the core-levels as well as the XPS and Ultraviolet Photoemission Spectra (UPS) from the valence bands the (Tl0.6Pb0.5)(Sr0.9Ba0.1)2Ca2Cu3Oy and (Bi1.75Pb0.35)Sr1.9Ca2.05Cu3.05Oy superconductors were measured and analysed. Special attention was paid to the valence band XPS and UPS, the Cu 2p core- level XPS and the Cu L2,3 -M4,5M4,5 and O K-L2,3L2,3 Auger spectra. Both the Cu 2p3/2 and Cu 2p1/2 core- level lines consisted of two spin-orbit split main lines accompanied by the two satellite lines. The charge transfer energy D from the oxygen ligand to the copper 3d9 states and the hopping integral t were estimated from the energy separation between the main line and the satellite line taking advantage of the local cluster model calculations and their extension to high- temperature superconductors. The Coulomb correlation on-site energy Udd of two electrons in the same copper orbital and Upp of two electrons in the oxygen orbital as well as the correlation energy Ucd of the 2p core hole - 3d electron interaction have been estimated from the Auger electron spectra and the valence band spectra. Udd = 6.0 ? 0.5 eV , Upp @ 10 ? 1 eV and Ucd @ 8.0 ? 0.5 eV were nearly the same for both the Tl- and Bi-compounds. We concluded that these compounds are the charge transfer strongly correlated metals.
Sprache der Kurzfassung:
Englisch
Journal:
Acta Physica Polonica A
Volume:
98
Number:
5
Erscheinungsmonat:
12
Erscheinungsjahr:
2000
Notiz zum Zitat:
Photoemission electronic states of Tl-1223 and Bi-2223 superconductors, R. Zalecki, A. Kolodziejczyk, W. König and G. Gritzner, Acta Phys. Polon., A 98 (2000) 513 - 524, ISSN 0587-4246
Forschungs-