Raman scattering in a d-wave superconductor - a one gap scenario

TL;DR

This paper demonstrates that Raman scattering data in underdoped cuprates, previously interpreted as evidence for two gaps, can be explained with a single gap model when considering final state interactions, aligning with observed doping dependencies.

Contribution

The study shows that a one gap scenario, including final state interactions, can explain Raman scattering data previously attributed to two gaps in cuprates.

Findings

Single gap model explains Raman data

Final state interactions are crucial

Doping dependence matches experimental data

Abstract

Recent Raman scattering data in B_{1g} and B_{2g} geometries in the superconducting state of underdoped cuprates were interpreted as evidence for two distinct energy gaps. We argue that these data can be equally well explained within a one gap scenario if final state interactions are taken into account. In particular, we show that they can account for the differing doping dependences of the Raman peaks in these two geometries.