Comment on ``Bethe Ansatz Results for the 4f-Electron Spectra of a Degenerate Anderson Model ''

Details Comment on ``Bethe Ansatz Results for the 4f-Electron Spectra of a Degenerate Anderson Model '' Comment on ``Bethe Ansatz Results for the 4f-Electron Spectra of a Degenerate Anderson Model ''

2001-11-22

arxiv.org/abs/cond-mat/0111432v1

Phys. Rev. Lett. 90, 099701 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

1 page, RevTeX, no figure

Scientific paper

10.1103/PhysRevLett.90.099701

In a recent letter, Zvyagin calculates the density of states for 4f electrons coupled to a conduction band in the framework of the Bethe ansatz (BA) solution for the degenerate Anderson model. It is claimed that the results qualitatively disagree with the results obtained for the same model but using a variational approach. Even the high energy feature in the f-spectral function near the 4f-level energy ef, i.e. the ``normal'' ionization peak (NIP), is argued to be qualitatively different in the two approaches. In the following we point out that this is not the case.

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