Skyrmion fluid and bimeron glass protected by a chiral spin liquid on a kagome lattice

TL;DR

This paper explores how a chiral spin liquid on a kagome lattice can stabilize skyrmions and bimerons at high temperatures, enabling control over their density and protecting them from thermal disintegration, leading to a topological spin glass state.

Contribution

It introduces a novel mechanism where a chiral spin liquid acts as an entropic buffer to stabilize skyrmions and bimerons at high temperatures on a kagome lattice.

Findings

Skyrmion density can be tuned by temperature.

A topological spin glass state emerges at high field.

Chiral spin liquid protects skyrmions from thermal disintegration.

Abstract

Skyrmions are of interest both from a fundamental and technological point of view, due to their potential to act as information carriers. But one challenge concerns their manipulation, especially at high temperature where thermal fluctuations eventually disintegrate them. Here we study the competition between skyrmions and a chiral spin liquid, using the latter as an entropic buffer to impose a quasi-vacuum of skyrmions. As a result, the temperature becomes a knob to tune the skyrmion density from a dense liquid to a diluted gas, protecting the integrity of each skyrmion from paramagnetic disintegration. With this additional knob in hand, we find at high field a topological spin glass made of zero- and one-dimensional topological defects (resp. skyrmions and bimerons).