Magneto-excitonic duality from monolayer to trilayer CrSBr

Two-dimensional (2D) layered magnetic materials (LMMs) are a newly emerging class of van der Waals materials. The air-stable, structurally and optically anisotropic A-type antiferromagnetic chromium sulfur bromide (CrSBr) is one of the most prominent examples of such LMMs. Our investigation shows that the unique duplexity, supporting both Frenkel- and Wannier-Mott-like excitons persists even in few-layer CrSBr.We investigated the magneto-excitonic coupling in atomically thin layers of the CrSBr. The data set includes measurements of magnetic susceptibility, reflectance contrast, photoluminescence, photoluminescence excitation, and atomic force microscopy.