Dynamical charge and spin density wave scattering in cuprate superconductor

TL;DR

This paper investigates how dynamical charge and spin density waves influence spectral features in high-temperature cuprate superconductors, explaining experimental observations through two theoretical models of fluctuating order.

Contribution

It introduces two models of dynamical scattering by fluctuating order in cuprates, linking spectral features to charge and spin density wave fluctuations.

Findings

Models reproduce STM and ARPES experimental results.

Quasiparticles are protected near the Fermi energy.

Long-range order manifests at higher energies.

Abstract

We show that a variety of spectral features in high-T_c cuprates can be understood from the coupling of charge carriers to some kind of dynamical order which we exemplify in terms of fluctuating charge and spin density waves. Two theoretical models are investigated which capture different aspects of such dynamical scattering. The first approach leaves the ground state in the disordered phase but couples the electrons to bosonic degrees of freedom, corresponding to the quasi singular scattering associated with the closeness to an ordered phase. The second, more phenomological approach starts from the construction of a frequency dependent order parameter which vanishes for small energies. Both theories capture scanning tunneling microscopy and angle-resoved photoemission experiments which suggest the protection of quasiparticles close to the Fermi energy but the manifestation of long-range order at higher frequencies.