Comment on "Spectroscopic Evidence for Multiple Order Parameters in the Heavy Fermion Superconductor CeCoIn5"

TL;DR

This paper critiques a recent spectroscopic study on CeCoIn5, arguing that the observed features are due to non-ballistic contact conditions rather than multiple order parameters.

Contribution

It provides a critical analysis of the previous work, highlighting the importance of contact regime assumptions in interpreting spectroscopic data.

Findings

Features attributed to multiple order parameters are likely due to contact conditions.

Non-ballistic contact can produce similar spectroscopic features.

Reevaluation of previous interpretations is necessary.

Abstract

This is a comment on recent paper by Rourke et al. titled "Spectroscopic Evidence for Multiple Order Parameters in the Heavy Fermion Superconductor CeCoIn5" (cond-mat/0409562v1 22 Sep 2004). We argue that the features observed by Rourke etal. arise from their contact not being in the ballistic limit.