Kondo scaling in the optical response of YbIn1-xAgxCu4.

@article{Hancock2004KondoSI,
  title={Kondo scaling in the optical response of YbIn1-xAgxCu4.},
  author={Jason N. Hancock and Tim McKnew and Zack Schlesinger and John L. Sarrao and Zach Fisk},
  journal={Physical review letters},
  year={2004},
  volume={92 18},
  pages={186405}
}
Theoretical work on Kondo systems predicts universality in the scaling of observable quantities with the Kondo temperature, T(K). Here we report infrared-frequency optical response measurements of the correlated system YbIn(1-x)AgxCu4. We observe that x-dependent variations in the frequency and strength of a low-energy excitation are related to the x-dependent Kondo temperature. Comparison of the inferred trends with existing theory and a model calculation provides a framework in which to view… CONTINUE READING

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