Kondo Scaling in the Optical Response of YbIn(1-x)AgxCu4
Jason N. Hancock, Tim McKnew, Zack Schlesinger, John L. Sarrao, Zach Fisk
Abstract
Theoretical work on Kondo systems predicts universality in the scaling of observable quantities with the Kondo temperature, TK. Here we report infrared-frequency optical response measurements of the correlated system . 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 these experimental results as scaling phenomena arising from local-moment/conduction electron hybridization.
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