| speaker: | Gertrud Zwicknagl Technische Universit&aauml;t Braunschweig |
| time: | Saturday, November 17, 11:05 - 11:30 |
Increasing experimental evidence points towards a two-fluid model for the low-temperature behavior of 5f systems. Assuming some 5f electrons to be localized atomic-like and others to be band-like itinerant can explain various unusual low-energy properties of U compounds including the formation of heavy fermion and their unconventional superconductivity. The central goal of the present contributin is to provide a microscopic understanding of the underlying physics. We derive criteria and specify properties which experimentally characterize correlation-induced partial localization in actinide compounds. Of particular interest are the 5f spectral function which can be related to photoemission data. Results for the U-based heavy fermion superconductor UPd2Al3 are presented emphasizing the consequences for the interpretation of experimental data.