The ingap state spectral properties in the cuprates' pseudogap phase

TL;DR

This paper investigates the local spectral features and their evolution into dispersive branches in the pseudogap phase of cuprates, predicting a distinctive 'S'-shaped dispersion detectable via ARPES.

Contribution

It introduces a model linking local resonant pairing to dispersive spectral features in cuprates' pseudogap phase, highlighting a specific 'S'-shaped dispersion pattern.

Findings

Identification of 'S'-shaped dispersive branches in spectral features

Prediction of detectable signatures in ARPES measurements

Connection between local excitations and global spectral properties

Abstract

The single-particle excitations, which initiate the pseudogap in the cuprate superconductors at some temperature T^*, relate to specific local spectral features of resonant pairing, where charge carriers get momentarily trapped on dynamically deformable molecular Cu-O-Cu clusters. We show how those local excitations evolve into dispersive branches with a characteristic "S"-like shape for three-peak structured ingap excitations in the cuprates' pseudogap phase, when we consider a lattice of such clusters. This feature should be detectable in "momentum distribution curve" ARPES analysis.