Excitons in Bulk and Layered Chromium Tri-Halides: From Frenkel to the Wannier-Mott Limit

Swagata Acharya, Dimitar Pashov, Alexander N. Rudenko +3

Excitons with large binding energies $\sim$2-3 eV in CrX${}_3$ are historically characterized as being localized (Frenkel) excitons that emerge from the atomic $d-d$ transitions…