Topological Spin Texture Created by Zhang--Rice Singlets in Cuprate Superconductors

TL;DR

This paper demonstrates that Zhang-Rice singlets in cuprate superconductors induce topological spin textures, specifically skyrmions, linking antiferromagnetic correlations with doping levels.

Contribution

It introduces a novel topological spin texture formation mechanism around Zhang-Rice singlets in cuprates, accounting for quantum correlations.

Findings

Skyrmions are created around Zhang-Rice singlets in doped cuprates.

The skyrmion formation links antiferromagnetic correlation with doping concentration.

Quantum correlation effects are crucial for the topological spin texture emergence.

Abstract

One of the most important effects of strong electron correlation in high-Tc cuprates is the formation of Zhang-Rice singlets. By fully accounting for the quantum correlation effect of Zhang-Rice singlet formation, we show that a topological spin texture, skyrmion, is created around a Zhang-Rice singlet in the single-hole-doped CuO2 plane. The skyrmion picture provides a natural connection between the antiferromagnetic correlation and the doping concentration x.