- Letter
Fractional Chern insulators in moiré flat bands with high Chern numbers
Phys. Rev. B 112, L201109 – Published 7 November, 2025
DOI: https://doi.org/10.1103/nkwx-twdl
Abstract
Recent discoveries of zero-field fractional Chern insulators in moiré materials have attracted intensive research interest. However, most current theoretical and experimental attempts focus on Chern bands with Chern number , in analogy to the Landau levels. Here, we propose candidate material systems for realizing fractional Chern insulators with higher Chern numbers. The material setup involves -valley twisted homobilayer transition metal dichalcogenides in proximity to a magnetic skyrmion lattice. The skyrmion exchange potential induces a flat band with a high Chern number . Using the momentum-space projected exact diagonalization method, we perform a comprehensive study at various filling factors, confirming the generalized Jain sequence. Our research provides theoretical guidance on realizing unconventional fractional Chern insulators beyond the Landau level picture.