Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa2Cu3O6+x

TL;DR

This paper proposes a model where bilayer charge ordering explains the observed quantum oscillation frequencies in underdoped YBa2Cu3O6+x, linking experimental findings from various spectroscopic techniques.

Contribution

It introduces a bilayer charge ordering model that accounts for multiple quantum oscillation frequencies and their relation to bonding and antibonding bands in the material.

Findings

Quantum oscillation frequencies are explained by bilayer charge modulations.

Different periods of charge order correspond to bonding and antibonding bands.

The model aligns with NMR and resonant x-ray spectroscopy data.

Abstract

We show that the distribution of quantum oscillation frequencies observed over a broad range of magnetic field can be reconciled with the wavevectors of charge modulations found in nuclear magnetic resonance and resonant x-ray spectroscopy experiments in underdoped YBa2Cu3O6+x within a model of biaxial charge ordering occurring in a bilayer CuO2 planar system. Bilayer coupling introduces the possibility of different period modulations and quantum oscillation frequencies corresponding to each of the bonding and antibonding bands, which can be reconciled with recent experimental observations