Multiple Quantum Phase Transitions of Plutonium compounds

TL;DR

This paper uses quantum Monte Carlo simulations on realistic models to demonstrate multiple quantum critical points in Plutonium compounds, predicting regions for superconductivity and suggesting experimental verification methods.

Contribution

It introduces a realistic Doniach phase diagram for Pu compounds and predicts multiple quantum critical points with implications for superconductivity.

Findings

Multiple quantum critical points can exist in Pu-based materials.

Regions conducive to magnetically mediated superconductivity are identified.

Predictions align with trends in Sommerfeld coefficients and magnetism.

Abstract

We show by quantum Monte Carlo simulations of realistic Kondo lattice models derived from electronic--structure calculations that multiple quantum critical points can be realized in Plutonium--based materials. We place representative systems including PuCoGa5 on a realistic Doniach phase diagram and identify the regions where the magnetically mediated superconductivity could occur. Solution of an inverse problem to restore the quasiparticle renormalization factor for f-electrons is shown to be sufficiently good to predict the trends among Sommerfeld coefficients and magnetism. Suggestion on the possible experimental verification for this scenario is given for PuAs.