Comment on ``Quantitative Model for the Superconductivity Suppression in R$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_7$ with Different Rare Earths''

TL;DR

This paper critiques a single-particle model explaining how Pr suppresses superconductivity in PrBa₂Cu₃O₇, showing it does not align with experimental ac conductivity data.

Contribution

It challenges the effectiveness of a proposed single-particle model for superconductivity suppression by Pr in PrBa₂Cu₃O₇.

Findings

Single-particle model inconsistent with ac conductivity data

Experimental evidence contradicts the model's assumptions

Highlights need for alternative explanations of Pr's role

Abstract

We argue that an effective single-particle model to explain the destructive role of Pr on superconductivity in PrBa$_2$Cu$_3$O$_7$, is inconsistent with the experimental ac conductivity in that compound.