Interpretation of Photoemission Spectra of (TaSe4)2I as Evidence of Charge Density Wave Fluctuations

TL;DR

This paper provides evidence of charge-density-wave fluctuations in (TaSe4)2I by analyzing photoemission spectra and comparing them with theoretical predictions, highlighting the complex behavior of quasi-one-dimensional conductors.

Contribution

It demonstrates that charge-density-wave fluctuations can explain spectral features in (TaSe4)2I, contrasting with Luttinger liquid behavior.

Findings

Spectra are consistent with charge-density-wave fluctuations.

Theoretical predictions match experimental photoemission data.

The behavior differs from that expected of a Luttinger liquid.

Abstract

The competition between different and unusual effects in quasi-one-dimensional conductors makes the direct interpretation of experimental measurements of these materials both difficult and interesting. We consider evidence for the existence of large charge-density-wave fluctuations in the conducting phase of the Peierls insulator (TaSe4)2I, by comparing the predictions of a simple Lee, Rice and Anderson theory for such a system with recent angle-resolved photoemission spectra. The agreement obtained suggests that many of the unusual features of these spectra may be explained in this way. This view of the system is contrasted with the behaviour expected of a Luttinger liquid.