Angle Resolved Photo-Emission Spectroscopy signature of the Resonant Excitonic State

TL;DR

This paper models the Resonant Excitonic State in cuprate superconductors and predicts its ARPES signature, successfully explaining the pseudogap phenomenon observed in experiments.

Contribution

It introduces a charge order model with 2p_F wave vectors for the RES and calculates its ARPES spectral features, aligning with experimental pseudogap data.

Findings

Model reproduces the pseudogap opening in Bi-2201

Spectral weight and density of states match experimental signatures

Resonant Excitonic State characterized as charge order with checkerboard modulation

Abstract

We calculate the Angle Resolved PhotoEmission Spectroscopy (ARPES) signature of the Resonant Excitonic State (RES) that was proposed as the Pseudo-Gap state of cuprate superconductors [ArXiv 1510.03038]. This new state can be described as a set of excitonic (particle-hole) patches with an internal checkerboard modulation. Here, we modelize the RES as a charge order with $\bf{2p_{F}}$ wave vectors, where $\bf{2p_{F}}$ is the ordering vector connecting two opposite sides of the Fermi surface. We calculate the spectral weight and the density of states in the RES and we find that our model correctly reproduces the opening of the PG in Bi-2201.