|Title||Flattening of single-particle spectra in strongly correlated electron systems and the violation of the Wiedemann-Franz law|
|Publication Type||Journal Article|
|Year of Publication||2008|
|Authors||V. A. Khodel, V. M. Yakovenko, and M. V. Zverev|
|Keywords||2008, Single Fellow|
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.