Multipolar Skyrmion Crystals in Non-Kramers Doublet Systems

Abstract

We study the Kondo lattice model of multipolar magnetic moments interacting with conduction electrons on a triangular lattice. Bond-dependent electron hoppings induce a compass-like anisotropy in the effective Ruderman-Kittel-Kasuya-Yosida interaction between multipolar moments. This unique anisotropy stabilizes multipolar skyrmion crystals at zero magnetic field. In a unit cell, the skyrmion fractionalizes into meron composites subject to the conservation of total topological charge. Diverse multipolar phases in the phase diagram give rise to novel spontaneous Hall response of conduction electrons.

6+6 pages, 4+3 figures

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Cited by in corpus (6)

• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Orbital moiré and quadrupolar triple-q physics in a triangular lattice
• Square skyrmion lattice in multiorbital $f$-electron systems
• Symmetry Rules on Multipole Interactions under Crystallographic Point Groups and Application to Multiple-$Q$ Multipole States
• Effects of crystal field and momentum-based frustrated exchange interactions on multiorbital square skyrmion lattice
• Charge ordering and spontaneous topological Hall effect in bilayer skyrmion crystals