Two-particle spectra of heavy-fermion systems

P. Valášek, W. von der Linden, V. Dose

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Abstract

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-Schönhammer 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 agremeent 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)7471-7475
Number of pages5
JournalPhysical Review / B
Volume51
Issue number12
DOIs
Publication statusPublished - 1 Mar 1995

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heavy fermion systems
Fermions
Spectroscopy
Impurities
spectroscopy
Experiments
impurities
expansion

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Two-particle spectra of heavy-fermion systems. / Valášek, P.; von der Linden, W.; Dose, V.

In: Physical Review / B, Vol. 51, No. 12, 01.03.1995, p. 7471-7475.

Research output: Contribution to journalArticleResearchpeer-review

Valášek, P. ; von der Linden, W. ; Dose, V. / Two-particle spectra of heavy-fermion systems. In: Physical Review / B. 1995 ; Vol. 51, No. 12. pp. 7471-7475.
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