Universal Scaling in the Dynamical Conductivity of Heavy Fermion Ce and Yb Compounds(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

概要

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Dynamical conductivity spectra [σ(ω)] have been measured for many heavy-fermion (HF) Ce and Yb compounds. A characteristic excitation peak has been observed in the infrared region of σ(ω) 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 low-energy charge excitations in a wide range of HF compounds.
社団法人日本物理学会の論文
2007-02-15