Comment on "Stranger than metals"

TL;DR

This paper critiques recent claims that gravity-based theories explain strange metal phenomena, asserting instead that fermion condensation theory provides a successful framework for understanding quantum criticality, Planckian dissipation, and high-$T_c$ superconductivity links.

Contribution

It challenges the notion that gravity-based models are necessary, highlighting fermion condensation theory as a more accurate explanation for strange metal behaviors.

Findings

Fermion condensation theory explains quantum criticality.

Fermion condensation theory accounts for Planckian dissipation.

Fermion condensation theory links high-$T_c$ superconductivity with strange metals.

Abstract

P. W. Phillips, N. E. Hussey, P. Abbamonte (Review Article, 8 July 2022, eabh4273) consider heavy fermion (HF) metals and high-$T_c$ superconductors naming them strange metals. They analyze such features of strange metals as quantum criticality, Planckian dissipation and recently observed fundamental link between the high-$T_c$ superconductivity and strange metals, and conclude that these problems can be possibly resolved within the framework of theories based on gravity, etc. In this comment we discuss that this claim is not correct and the successful description of the quantum criticality, Planckian dissipation and recently observed fundamental link between the high-$T_c$ superconductivity and strange metals has been given within the framework of the fermion condensation theory.