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-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
Volume72
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: Journal of electron spectroscopy and related phenomena, Vol. 72, 01.03.1995, p. 229-234.

Research output: Contribution to journalArticleResearchpeer-review

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AU - von der Linden, W

AU - Dose, V

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N2 - 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.

AB - 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.

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DO - 10.1016/0368-2048(94)02314-X

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