Comment on "Fluctuation-Driven First-Order Transition in Pauli-Limited $d$-Wave Superconductors"

TL;DR

This paper critiques a recent study on the FFLO state in CeCoIn5, emphasizing that neglecting vortices in Pauli-limited models makes them unsuitable for describing the phenomenon.

Contribution

It highlights the importance of vortices in accurately modeling the FFLO state, challenging previous approaches that ignore vortex effects.

Findings

Neglecting vortices leads to inaccurate descriptions of the FFLO state.

Vortices play a crucial role in the physics of CeCoIn5.

Pauli-limited models without vortices are inadequate.

Abstract

This is a Comment on a recent Letter (Phys.Rev.Lett.93, 247002 (2004)) written by Dalidovich and Yang. It is pointed out that any Pauli-limited approach neglecting the vortices is inapplicable to describing the FFLO state in CeCoIn5.