Spectral functions for strongly correlated 5f-electrons

TL;DR

This paper uses Cluster Perturbation Theory to compute spectral functions of 5f-electron systems, revealing coexistence of coherent bands and local transitions, supporting the concept of partial localization.

Contribution

It introduces a method for accurately calculating spectral functions in 5f-compounds, emphasizing short-range correlations and partial localization effects.

Findings

Coherent 5f bands coexist with local intra-atomic transition features.

Results support the microscopic basis for partial localization.

Spectral functions calculated for linear chain models.

Abstract

We calculate the spectral functions of model systems describing 5f-compounds adopting Cluster Perturbation Theory. The method allows for an accurate treatment of the short-range correlations. The calculated excitation spectra exhibit coherent 5f bands coexisting with features associated with local intra-atomic transitions. The findings provide a microscopic basis for partial localization. Results are presented for linear chains.