Quantitative comparison of single- and two-particle properties in the cuprates

TL;DR

This paper compares single- and two-particle electronic properties in cuprates across doping levels, using Raman response and ARPES data, revealing agreements at high doping and discrepancies at low doping, especially near 21% doping.

Contribution

It provides a quantitative analysis of electronic properties in cuprates, highlighting limitations of current models in explaining spectral weight suppression near specific momentum points.

Findings

Agreement between Raman and ARPES at high doping

Discrepancies at low doping, especially near 21% doping

Challenges in reconciling data with angle-dependent scattering models

Abstract

We explore the strong variations of the electronic properties of copper-oxygen compounds across the doping phase diagram in a quantitative way. To this end we calculate the electronic Raman response on the basis of results from angle-resolved photoemission spectroscopy (ARPES). In the limits of our approximations we find agreement on the overdoped side and pronounced discrepancies at lower doping. In contrast to the successful approach for the transport properties at low energies, the Raman and the ARPES data cannot be reconciled by adding angle-dependent momentum scattering. We discuss possible routes towards an explanation of the suppression of spectral weight close to the $(\pi,0)$ points which sets in abruptly close to 21% doping.