Author(s): Bokai Liang, Wei Qin, and Zhenyu Zhang Fractional Chern insulators are interaction-driven topological states that realize the lattice analog of the fractional quantum Hall effect without external magnetic fields. Here we propose a programmable platform for engineering topological flat bands by combining a Zeeman field with a tunable elec… [Phys. Rev. Lett. 137, 126604] Published Wed Sep 16, 2026