Polar Jahn-Teller centers and magnetic neutron scattering cross-section in copper oxides

TL;DR

This paper models magnetic neutron scattering in high-temperature cuprates using polar Jahn-Teller centers, revealing how local structure and charge states influence magnetic form-factors and enabling the study of non-magnetic excitations.

Contribution

It introduces a model for magnetic neutron scattering in cuprates based on polar singlet-triplet Jahn-Teller centers, linking local structure to scattering properties.

Findings

Dependence of magnetic form-factor on local structure and charge state.

Magnetic inelastic neutron scattering probes non-magnetic excitations.

Multi-mode character of CuO4 cluster ground manifold influences scattering.

Abstract

In the framework of the model of the polar singlet-triplet Jahn-Teller centers the cross-section is obtained for magnetic neutron scattering in high-$T_{c}$ cuprates. Multi-mode character of the $CuO_{4}$ cluster ground manifold in the new phase of polar centers determines the dependence of magnetic form-factor on the local structure and charge state of the center. It is shown that magnetic inelastic neutron scattering in the system of the polar singlet-triplet Jahn-Teller centers permits to investigate the non-magnetic charge and structure excitations.