Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds

Details Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds

2006-04-27

arxiv.org/abs/cond-mat/0604612v4

J. Phys. Soc. Jpn. 76 (2007) 023703

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 table, 3 figures, to appear in J. Phys. Soc. Jpn. 76 (2007)

Scientific paper

Dynamical conductivity spectra s(w) have been measured for a diverse range of heavy-fermion (HF) Ce and Yb compounds. A characteristic excitation peak has been observed in the mid-infrared region of s(w) for all the compounds, and has been analyzed in terms of a simple model based on conduction (c)-f electron hybridized band. A universal scaling is found between the observed peak energies and the estimated c-f hybridization strengths of these HF compounds. This scaling demonstrates that the model of c-f hybridized band can generally and quantitatively describe the charge excitation spectra of a wide range of HF compounds.

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