Magneto-optical interactions in semiconductor /antiferromagnet van der waals heterostructures.

Heterostructures with semiconductors have been found to host rich quantum phenomena. The weak van der Waals interactions facilitate the stacking and combination of different Van der Waals species, creating novel non thermal equilibrium quantum materials. A recent interest in antiferromagnetic (AFM) 2D materials has emerged due to their robustness against external magnetic noise, tunable magnetism, and the potential for exotic spin textures as well as applications like high speed data processing and spintronics [1-3]. Integrating AFMs with well-studied semiconducting monolayers provides a clean platform to probe magnetic proximity and magneto-optical coupling. Here we investigate WSe₂/MnPS₃ heterostructures and observe: (i) pronounced interfacial charge transfer, (ii) enhanced emission polarization, and (iii) the emergence of a distinct low-energy photoluminescence peak consistent with interlayer excitons. These results highlight how semiconductor/2D-magnet interfaces can host rich magneto-optical phenomena and provide versatile knobs for engineering spin and valley responses in Van der Waals heterostructures.