Multipolar Skyrmion Crystals in Non-Kramers Doublet Systems
Strongly Correlated Electrons
2025-02-17 v2 Mesoscale and Nanoscale Physics
Materials Science
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.
Keywords
Cite
@article{arxiv.2404.14404,
title = {Multipolar Skyrmion Crystals in Non-Kramers Doublet Systems},
author = {Hao Zhang and Shi-Zeng Lin},
journal= {arXiv preprint arXiv:2404.14404},
year = {2025}
}
Comments
6+6 pages, 4+3 figures