Comment on "Direct evidence for hidden one-dimensional Fermi surface of hexagonal K0.25WO3"

TL;DR

This paper critiques a previous study by using first principles DFT calculations to challenge the claim of one-dimensional Fermi surface bands in K0.25WO3, questioning the origin of its resistivity anomaly.

Contribution

It provides a first-principles computational analysis that refutes the existence of the proposed one-dimensional bands in K0.25WO3.

Findings

No evidence of one-dimensional bands from DFT calculations

Challenges the charge density wave explanation for resistivity anomaly

Questions previous interpretations of photoemission data

Abstract

We comment a recent work titled "Direct evidence for hidden one-dimensional Fermi surface of hexagonal K0.25WO3". In this paper the authors report photoemission and theoretical results on the K0.25WO3 system which led them to propose that a Charge Density Wave (CDW), associated with hidden one-dimensional bands, was responsible for the well known resistivity anomaly in such system. In the present comment we report the results of a first principles density functional theory (DFT) study showing that there are no one-dimensional bands as suggested by these authors.