Breakup of a Stoner model for the 2D ferromagnetic quantum critical point

TL;DR

This paper argues that the Stoner model cannot describe the ferromagnetic quantum critical point in two dimensions due to significant interactions between paramagnetic fluctuations and Cooper pairing.

Contribution

It provides a reinterpretation showing the limitations of the Stoner model for 2D ferromagnetic quantum criticality.

Findings

Stoner model fails to capture 2D FQCP behavior

Strong interplay between paramagnetic fluctuations and Cooper channel

Reinterpretation challenges previous theoretical assumptions

Abstract

Re-interpretation of the results by [A. V. Chubukov et. al., Phys. Rev. Lett. 90, 077002 (2003)] leads to the conclusion that ferromagnetic quantum critical point (FQCP) cannot be described by a Stoner model because of a strong interplay between the paramagnetic fluctuations and the Cooper channel, at least in two dimensions.