# Quantum critical scaling and fluctuations in Kondo lattice materials

## TL;DR

This paper introduces a new phenomenological framework for Kondo lattice materials that explains distinct quantum critical scaling behaviors arising from antiferromagnetic and hybridization fluctuations, supported by experimental data.

## Contribution

It presents a novel framework combining antiferromagnetic and hybridization quantum critical fluctuations to explain diverse scaling phenomena in Kondo lattice materials.

## Key findings

- Logarithmic scaling in the density of states below T*
- Unconventional power law resistivity scaling below T_QC
- Experimental support from CeCoIn5 and CeRhIn5 measurements

## Abstract

We propose a new 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*; while the unconventional power law scaling in the resistivity that emerges at lower temperatures below T_QC 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.