Comment: Disappearance of Metal-Like Behavior in GaAs Two-Dimensional Holes below 30 mK

TL;DR

This paper discusses the interpretation of experimental data on GaAs two-dimensional holes at very low temperatures, suggesting the observed phenomena can be explained by a 2D Kondo effect rather than a disappearance of metallic behavior.

Contribution

It offers an alternative explanation for the observed behavior in GaAs 2D holes, challenging previous interpretations of metallic disappearance at ultra-low temperatures.

Findings

Kondo effect explains the data well

Density dependence of Kondo temperature matches observations

Disappearance of metallic behavior may not be real

Abstract

The Comment claims the Huang et al. can be explained as a 2D Kondo effect and as such does not represent a disappearance of metallic behavior. The density dependence of the Kondo temperature is in good agreement with the data.