Due to the presence of flat Chern bands, moir\'e transition metal dichalcogenide (TMD) bilayers are a platform to realize strongly correlated topological phases of fermions such as fractional Chern insulators. TMDs are also known to host long-lived excitons, which inherit the topology of the underlying Chern bands. For the particular example of MoTe2/WSe2 heterobilayers we perform a time-dependent Hartree-Fock calculation to identify a regime in the phase diagram where the excitons themselves form a topological flat band. This paves a way towards realizing strongly correlated states of bosons in moir\'e TMDs.
@article{arxiv.2409.04371,
title = {Topological excitons in moir\'e MoTe$_2$/WSe$_2$ heterobilayers},
author = {Paul Froese and Titus Neupert and Glenn Wagner},
journal= {arXiv preprint arXiv:2409.04371},
year = {2025}
}