2024/08/10 by Kyoung-Min Kim, Kim, Kyoung-Min, Se Kwon Kim +1 · 2 citations
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetism in coordination complexes #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Nonlinear Waves and Solitons #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2408.05616
openalex publication_date 2024/08/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A Kekulé lattice is an exotic, distorted lattice structure exhibiting alternating bond lengths, distinguished from naturally formed atomic crystals. Despite its evident applicability, the formation of a Kekulé lattice from topological solitons in magnetic systems has remained elusive. Here, we propose twisted bilayer easy-plane Néel antiferromagnets as a promising platform for achieving a "Meron Kekulé lattice"--a distorted topological soliton lattice comprised of antiferromagnetic merons as its lattice elements. We demonstrate that the cores of these merons are stabilized into the Kekulé-O pattern with different intracell and intercell bond lengths across moiré supercells, thereby forming a Meron Kekulé lattice. Moreover, the two bond lengths of the Meron Kekulé lattice can be fine-tuned by adjusting the twist angle and specifics of the interlayer exchange coupling, suggesting extensive control over the meron lattice configuration in contrast to conventional magnetic systems. These discoveries pave the way for exploring topological solitons with distinctive Kekulé attributes.