A perturbative approach to J mixing in f-electron systems: Application to actinide dioxides

TL;DR

This paper introduces a perturbative model for crystal-field calculations in f-electron systems that accounts for J-mixing, providing analytical results and interpreting experimental data for actinide dioxides.

Contribution

It presents a novel perturbative approach to include J-mixing in crystal-field models, applicable to actinide dioxides with cubic symmetry.

Findings

Analytical J-mixing results derived for cubic symmetry.

Interpretation of experimental data for actinide dioxides.

Unified understanding of crystal-field effects across compounds.

Abstract

We present a perturbative model for crystal-field calculations, which keeps into account the possible mixing of states labelled by different quantum number J. Analytical J-mixing results are obtained for a Hamiltonian of cubic symmetry and used to interpret published experimental data for actinide dioxides. A unified picture for all the considered compounds is proposed by taking into account the scaling properties of the crystal-field potential.