Topological Wannier excitons in bismuth chalcogenide nanosheets I: Single-particle properties

L. Maisel Licerán, F. García Flórez, Laurens D. A. Siebbeles +1

We analyze the topology and dispersion of bulk Wannier excitons in nanosheets of topological insulators in the family of bismuth chalcogenides. Our main finding is that excitons al…