Dispersion Anomalies in Bilayer Cuprates and the Odd Symmetry of the Magnetic Resonance

TL;DR

This paper presents a theoretical model explaining ARPES data in bilayer cuprates, highlighting how electron interactions with an odd-symmetry magnetic resonance mode cause dispersion anomalies.

Contribution

It introduces a model that quantitatively reproduces spectral features and links dispersion anomalies to an odd-symmetry magnetic resonance mode.

Findings

Reproduces ARPES lineshapes and dispersions accurately

Links dispersion anomalies to electron interactions with an odd-symmetry magnetic mode

Supports the magnetic resonance as a key factor in bilayer cuprate behavior

Abstract

We present a theoretical model which accounts for recent angle resolved photoemission data in bilayer cuprate superconductors. Lineshapes and dispersions of the various bonding and antibonding features in the spectra are quantitatively reproduced. The observed dispersion anomalies are consistent with the interaction of electrons with a bosonic mode which is odd with respect to the layer indices, a unique property of the magnetic resonance observed by inelastic neutron scattering.