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

被引：0
|
作者：
V. A. Khodel
V. M. Yakovenko
M. V. Zverev
机构：
[1] Russian Research Centre Kurchatov Institute,McDonnell Center for Space Science and Department of Physics
[2] Washington University,Condensed Matter Theory Center and Center for Superconductivity Research, Department of Physics
[3] University of Maryland,undefined
来源：
JETP Letters | 2008年 / 86卷
关键词：
71.10.Hf; 71.27.+a;
D O I：
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中图分类号：
学科分类号：
摘要：
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 ∈(p) becomes flat. Results of the analysis are compared with available experimental data.
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页码：772 / 778
页数：6
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