Composite Spin Crystal Phase in Antiferromagnetic Chiral Magnets

Abstract

We study the classical antiferromagnetic Heisenberg model on the triangular lattice with Dzyaloshinskii-Moriya interactions in a magnetic field. We focus in particular in the emergence of a composite spin crystal phase, dubbed antiferromagnetic skyrmion lattice, that was recently observed in [Phys. Rev. B 92, 214439 (2015)] for intermediate fields. This complex phase can be made up from three inter-penetrated skyrmion lattices, one for each sub-lattice of the original triangular one. Following these recent numerical results, in this paper we explicitly construct the low-energy effective action that reproduces the correct phenomenology and could serve as a starting point to study the coupling to charge carriers, lattice vibrations, structural disorder and transport phenomena.

8 pages, 6 figures

References in corpus (6)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Skyrmions and Anomalous Hall Effect in a Dzyloshinskii-Moriya Spiral Magnet
• Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets
• Skyrmion Lattice in Two-Dimensional Chiral Magnet
• Three-sublattice Skyrmion crystal in the antiferromagnetic triangular lattice
• Magnetic phase diagrams of classical triangular and kagome antiferromagnets

Cited by in corpus (18)

• Spontaneous antiferromagnetic skyrmion/antiskyrmion lattice and spiral spin liquid states in the frustrated triangular lattice
• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Anisotropy driven response of skyrmion lattice in MnSc${}_2$S${}_4$ to applied magnetic fields
• Spirals and skyrmions in antiferromagnetic triangular lattices
• Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
• Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
• Stability of skyrmion crystal phase in antiferromagnetic triangular lattice with DMI and single-ion anisotropy
• From skyrmions to Z2 vortices in distorted chiral antiferromagnets
• Antiferromagnetic Skyrmions and Skyrmion Density Wave in Rashba Hund's Insulator
• Formation and growth of skyrmion crystal phase in a frustrated Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interaction
• Frustrated Antiferromagnetic Triangular Lattice with Dzyaloshinskii-Moriya Interaction: Ground States, Spin Waves, Skyrmion Crystal, Phase Transition
• Skyrmion crystals in frustrated Shastry-Sutherland magnets
• Antiferro skyrmion crystal phases in a synthetic bilayer antiferromagnet under an in-plane magnetic field
• Frustration-driven topological textures on the honeycomb lattice: antiferromagnetic meron-antimeron and skyrmion crystals emerging from spiral spin liquids
• Road to zero-field antiferromagnetic skyrmions in a frustrated AFM/FM heterostructure
• Anomalous Hall effect in the coplanar antiferromagnetic coloring-triangular lattice
• Skyrmion-skyrmion interaction induced by itinerant electrons in a ferromagnetic strip
• Three-sublattice antiferro-type and ferri-type skyrmion crystals in centrosymmetric magnets