Comment on ``Spin Polarization and Magnetic Circular Dichroism in Photoemission from the 2p Core Level of Ferromagnetic Ni''

TL;DR

This paper discusses the limitations of the Ni_4 cluster model in explaining spin polarization and magnetic circular dichroism in ferromagnetic nickel photoemission, highlighting inconsistencies with experimental observations.

Contribution

It critically analyzes the Ni_4 cluster approach, emphasizing its incompatibility with a coherent interpretation of dichroism experiments in ferromagnetic nickel.

Findings

Ni_4 cluster includes more band structure information

Ni_4 favors peculiar ground states incompatible with experiments

Highlights limitations of the Anderson impurity model

Abstract

Although the Ni_4 cluster includes more information regarding the Ni band structure with respect to the Anderson impurity model, it also favors very peculiar ground states which are incompatible with a coherent picture of all dichroism experiments.