2023/04/24 by Łucja Kipczak, Kipczak, Łucja, Zhaolong Chen +15 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Atomic and Subatomic Physics Research #FOS: Physical sciences #Gas Sensing Nanomaterials and Sensors #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
paper · pdf · doi:10.48550/arxiv.2304.11896
openalex publication_date 2023/04/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Quantum phenomena at interfaces create functionalities at the level of materials. Ferromagnetism in van der Waals systems with diverse arrangements of spins opened a pathway for utilizing proximity magnetic fields to activate properties of materials which would otherwise require external stimuli. Herewith, we realize this notion via creating heterostructures comprising bulk CrCl3 ferromagnet with in-plane easy-axis magnetization and monolayer WSe2 semiconductor. We demonstrate that the in-plane component of the proximity field activates the dark excitons within WSe2. Zero-external-field emission from the dark states allowed us to establish the in-plane and out-of-plane components of the proximity field via inspection of the emission intensity and Zeeman effect, yielding canted orientations at the degree range of 10∘ - 30∘ at different locations of the heterostructures, attributed to the features of interfacial topography. Our findings are relevant for the development of spintronics and valleytronics with long-lived dark states in technological timescales and sensing applications of local magnetic fields realized simultaneously in multiple dimensions.