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Flattening of single-particle spectra in strongly correlated electron systems and the violation of the Wiedemann-Franz law

TitleFlattening of single-particle spectra in strongly correlated electron systems and the violation of the Wiedemann-Franz law
Publication TypeJournal Article
Year of Publication2008
AuthorsV. A. Khodel, V. M. Yakovenko, and M. V. Zverev
JournalJETP Letters
Volume86
Pagination772–778
Date Publishedfeb
ISSN0021-3640
Keywords2008, Single Fellow
Abstract

The renormalization of the Wiedemann-Franz (WF) ratio in strongly correlated electron systems is analyzed within the Landau quasiparticle picture. We demonstrate that the WF law is violated: (i) at the quantum critical point, where the effective mass diverges, and (ii) beyond a point of fermion condensation, where the single-particle spectrum \$\backslash epsilon(p)\$ becomes flat. Results of the analysis are compared with available experimental data.

URLhttp://arxiv.org/abs/0711.3777