Spin and Charge Texture around In-Plane Charge Centers in the CuO_2 planes

TL;DR

This paper investigates the spin and charge textures around in-plane charge centers in CuO_2 planes, revealing skyrmion formation around localized holes, which impacts magnetic order and can be detected via neutron scattering and NMR.

Contribution

It demonstrates that skyrmion spin textures form around localized holes in CuO_2 planes, extending previous theories to La_2Cu_{1-x}Li_xO_4 doping scenarios.

Findings

Skyrmion textures are favored around localized holes.

Magnetic order is rapidly suppressed despite hole localization.

Skyrmions may be observable via neutron scattering and NMR.

Abstract

Recent experiments on La_2Cu_{1-x}Li_xO_4 show that although the doped holes remain localized near the substitutional Li impurities, magnetic order is rapidly suppressed. An examination of the spin texture around a bound hole in a CuO_2 plane shows that the formation of a skyrmion is favored in a wide range of parameters, as was previously proposed in the context of Sr doping. The spin texture may be observable by elastic diffuse neutron scattering, and may also have a considerable effect on NMR lineshapes.