Odd parity charge density-wave scattering in cuprates

TL;DR

This paper presents a model explaining how superconducting electrons interact with a frequency-dependent charge-density wave, reconciling experimental observations of quasiparticles and electronic order in cuprates.

Contribution

It introduces a theoretical framework that captures both low-energy quasiparticles and high-energy electronic order, explaining STM contrast reversal and inhomogeneities in cuprates.

Findings

Reproduces STM contrast reversal between positive and negative bias.

Links scattering rate to electronic inhomogeneities.

Accounts for coexistence of quasiparticles and charge order.

Abstract

We investigate a model where superconducting electrons are coupled to a frequency dependent charge-density wave (CDW) order parameter Delta(w). Our approach can reconcile the simultaneous existence of low energy Bogoljubov quasiparticles and high energy electronic order as observed in scanning tunneling microscopy (STM) experiments. The theory accounts for the contrast reversal in the STM spectra between positive and negative bias observed above the pairing gap. An intrinsic relation between scattering rate and inhomogeneities follows naturally.