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Published on: April 14, 2020
Kondo scaling in the optical response of YbIn1-xAgxCu4
Jason N Hancock1, Tim McKnew, Zack Schlesinger
1Physics Department, University of California-Santa Cruz, Santa Cruz, CA 95064, USA.
Abstract:
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 these experimental results as scaling phenomena arising from local-moment/conduction electron hybridization.
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