Skyrmion Crystals in the Triangular Kondo Lattice Model

TL;DR

This paper investigates how skyrmion crystals form in a triangular Kondo lattice model, revealing that known chiral antiferromagnetic order is a dense limit of skyrmion crystals influenced by Fermi wave-vector, aiding the search in metallic materials.

Contribution

It demonstrates that the four-sublattice chiral antiferromagnetic order can be viewed as the dense limit of skyrmion crystals governed by Fermi wave-vector effects.

Findings

Chiral antiferromagnetic order is a dense limit of skyrmion crystals.

Skyrmion lattice parameters are dictated by the Fermi wave-vector.

Implications for discovering skyrmion crystals in metallic materials.

Abstract

We present a systematic study of the formation of skyrmion crystals in a triangular Kondo Lattice model for generic electron filling fractions. Our results indicate that the four-sublattice chiral antiferromagnetic ordering that was reported more than one decade ago can be understood as the dense limit of a sequence of skyrmion crystals whose lattice parameter is dictated by the Fermi wave-vector. This observation has important implications for the ongoing search of skyrmion crystals in metallic materials with localized magnetic moments.