Quantum critical scaling and fluctuations in Kondo lattice materials [Physics]
We propose a phenomenological framework for three classes of Kondo lattice materials that incorporates the interplay between
the fluctuations associated with the antiferromagnetic quantum critical point and those produced by the hybridization quantum
critical point that marks the end of local moment behavior. We show that these fluctuations give rise to two distinct regions
of quantum critical scaling: Hybridization fluctuations are responsible for the logarithmic scaling in the density of states
of the heavy electron Kondo liquid that emerges below the coherence temperature
T∗, whereas the unconventional power law scaling in the resistivity that emerges at lower temperatures below
TQC may reflect the combined effects of hybridization and antiferromagnetic quantum critical fluctuations. Our framework is supported
by experimental measurements on CeCoIn5, CeRhIn5, and other heavy electron materials.
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