Comment on ``Coexistence of superconductivity and ferromagnetism in ferromagnetic metals"

TL;DR

This paper critiques a specific single-band itinerant electron model, arguing it cannot explain the coexistence of superconductivity and ferromagnetism in ferromagnetic metals.

Contribution

It provides a critical analysis showing the limitations of a proposed model for coexistence of superconductivity and ferromagnetism.

Findings

The model cannot account for coexistence of superconductivity and ferromagnetism.

Highlights the need for alternative models to explain coexistence.

Questions the validity of previous theoretical approaches.

Abstract

We argue that a single-band itinerant electron model with short-range interactions, proposed by Karchev et al. (cond-mat/9911489) and investigated further by Jackiewicz et al. (cond-mat/0302449), cannot describe the coexistence of superconducting and ferromagnetic order.