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Article Abstract
Magnetic van der Waals (vdW) heterostructures (HSs), whose interface engineering enables versatile manipulation of charge and spin transfer, have received considerable interest. However, the dynamics underlying these exotic interfacial phenomena require deeper investigation. In this work, we investigated the interfacial charge transfer dynamics in a HS comprising layered antiferromagnetic NiPS and transition metal dichalcogenide WS. Under resonant excitation of WS, we observed significant enhancement of the - transition in NiPS, driven by the charge transfer from the WS to Ni 3 orbital. Additionally, an anomalous enhancement of trion emission in WS was observed, accompanied by a relatively slow (∼23 ps) charge transfer from NiPS to WS, attributed to the localized feature of Ni 3 orbitals. Our findings highlight the unique localization property of the -orbital in magnetic materials and provide valuable insights into the interfacial dynamics of magnetic vdW HS, which are fundamentally important for designing novel devices.
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