Vortex Created by Skyrmion Spin Texture under Magnetic Field

TL;DR

This paper demonstrates that skyrmion spin textures in two-dimensional magnetic systems induce vortex currents under magnetic fields, potentially explaining large Nernst signals in high-temperature cuprates.

Contribution

It introduces a novel vortex creation mechanism around skyrmions driven by a spin motive force, applicable to both ferromagnetic and antiferromagnetic materials.

Findings

Vortex currents are generated around skyrmions under magnetic fields.

The mechanism explains large Nernst signals in pseudogap phases.

Applicable to systems without superconductivity correlations.

Abstract

We show that a vortex current is created around a skyrmion spin texture under magnetic field due to a radial spin motive force in a two-dimensional metal with localized magnetic moments even in the absence of any superconductivity correlations. The effect is expected both for ferromagnetic and for antiferromagnetic systems. The Skyrmion-induced vortex mechanism provides a picture for large Nernst signals observed in the pseudogap phase of the high-$T_c$ cuprates.