Comment on "Single Hole Dynamics in the CuO$_2$ Plane at Half Filling"

TL;DR

This paper critically examines recent photoemission data on Sr_2CuO_2Cl_2, questioning the extraction of the O 2p hopping integral and cautioning against overinterpreting line-width analyses for scattering mechanisms.

Contribution

It provides a critical analysis of experimental data, highlighting limitations in deducing hopping parameters and scattering insights from line-widths.

Findings

Questioned the accuracy of $t_{pp}$ values derived from experiments

Warned against overinterpreting line-widths for scattering mechanisms

Emphasized the need for careful data interpretation in cuprate studies

Abstract

In a recent letter, Pothuizen et al. reported angle-resolved photoemission data on the single-layer insulating cuprate Sr_2CuO_2Cl_2. This comment addresses the issue whether it is possible to deduce an accurate value for the O 2p hopping integral $t_{pp}$ from these experiments, and also cautions against drawing conclusions concerning scattering mechanisms in the CuO_2 plane from a line-width analysis.