Spin dynamics in the stripe phase of the cuprates

TL;DR

This paper investigates how stripe spin and charge order coexist with d-wave superconductivity in cuprates, affecting spin dynamics and explaining neutron scattering observations of magnetic excitations.

Contribution

It presents a self-consistent model analyzing electronic structure and spin susceptibility in the stripe and superconducting phases, revealing damping effects on spin waves.

Findings

Stripe order influences low-energy spin excitations.

Particle-hole continuum dampens spin wave branches.

Results align with neutron scattering data.

Abstract

Within a model that supports stripe spin and charge order coexisting with a d$_{x^2-y^2}$-wave superconducting phase, we study the self-consistently obtained electronic structure and the associated transverse dynamical spin susceptibility. In the coexisting phase of superconducting and static stripe order, the resulting particle-hole continuum can strongly damp parts of the low-energy spin wave branches. This provides insight into recent inelastic neutron scattering data revealing the dispersion of the low-energy collective magnetic modes of lanthanum based cuprate superconductors.