Quantum criticality of Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$ : the magnetically ordered phase

TL;DR

This study investigates the quantum critical behavior of Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$ through specific heat and neutron scattering, revealing persistent Kondo effects and gradual magnetic localization near the quantum phase transition.

Contribution

It provides experimental insights into the magnetic and electronic evolution across the quantum critical point in Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$, highlighting non-vanishing Kondo temperature and gradual magnetic localization.

Findings

Kondo temperature remains finite at the quantum phase transition.

Magnetism gradually localizes as La concentration increases.

Elastic scattering indicates a smooth evolution of magnetic order.

Abstract

We report specific heat and neutron scattering experiments performed on the system Ce$_{1-x}$La$_{x}$Ru$_{2}$Si$_{2}$ on the magnetic side of its quantum critical phase diagram. The Kondo temperature does not vanish at the quantum phase transition and elastic scattering indicates a gradual localisation of the magnetism when $x$ increases in the ordered phase.