Highly Polarized Single-Photon Emission from Localized Excitons in a WSe/CrSBr Heterostructure.

Single-photon emitters (SPEs) are crucial in quantum communication and information processing. In 2D transition metal dichalcogenides (TMDs), SPEs are realized through inhomogeneous strain, while in combination with 2D magnets, a high spontaneous out-of-plane magnetization can be induced due to proximity effects. Here, an alternative is proposed that consists of suspending a TMD monolayer (WSe) on a few-layer antiferromagnet (CrSBr) with in-plane magnetic ordering.