Two-particle spectra of heavy fermion systems

P Valášek, W von der Linden, V Dose

Research output: Contribution to journalArticlepeer-review


Appearance potential spectra of heavy fermion systems are presented and analyzed in the frame of the Gunnarsson-Schönhammer approach for the Anderson-Impurity model. This procedure has been used successfully to describe a wide variety of one-particle spectroscopies of 4f systems. Here we present a generalization of the Gunnarsson-Schönhammmer approach for two-particle response functions, measured in appearance-potential spectroscopy. Calculations and experiments are presented for CeNi5 and CePd3. It appears that the first term in the 1/N expansion already gives strikingly good agreement with the experimental data and the Gunnarsson-Schönhammer approach describes two-particle response functions as reliably as those of one-particle spectra.
Original languageEnglish
Pages (from-to)229-234
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Publication statusPublished - 1 Mar 1995


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