Half-skyrmion picture of single hole doped high-T_c cuprate

TL;DR

This paper models the spin configuration around a doped hole in high-T_c cuprates using a half-skyrmion framework, revealing similarities in excitation spectra with the -flux phase, advancing understanding of magnetic properties in these materials.

Contribution

It introduces a half-skyrmion description for the spin structure around a doped hole, connecting it to known excitation spectra in high-T_c cuprates.

Findings

Spin configuration around a Zhang-Rice singlet is a half-skyrmion.

Excitation spectrum matches that of the -flux phase.

Provides a new perspective on magnetic excitations in doped cuprates.

Abstract

The single hole doped CuO_2 plane is studied by the O(3) non-linear \sigma model and its CP^1 representation. It is argued that the spin configuration around a Zhang-Rice singlet is described by a half-skyrmion. The form of the excitation spectrum of the half-skyrmion is the same as that in the \pi-flux phase.