Interplay of Energy and Charge Transfer in WSe2/CrSBr Heterostructures
José Roberto de Toledo (Universidade Federal de São Carlos)
Caique Serati de Brito (Universidade Federal de São Carlos)
Barbara L.T. Rosa (Technical University of Berlin)
Alisson R. Cadore
César Ricardo Rabahi (Universidade Federal de São Carlos)
Paulo E. Faria Junior (University of Central Florida)
Talieh S. Ghiasi (TU Delft - QN/Ghiasi Lab, Kavli institute of nanoscience Delft)
Josep Ingla-Aynés (TU Delft - QN/van der Zant Lab, Kavli institute of nanoscience Delft)
Herre S.J. van der Zant (TU Delft - QN/van der Zant Lab, Kavli institute of nanoscience Delft)
undefined More Authors (External organisation)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
van der Waals heterostructures (vdWHs) composed of transition-metal dichalcogenides (TMDs) and layered magnetic semiconductors offer great opportunities to manipulate the exciton and valley properties of TMDs. Here, we present magneto-photoluminescence (PL) studies in a WSe2monolayer (ML) on a CrSBr crystal, an anisotropic layered antiferromagnetic semiconductor. Our results reveal the unique behavior of each of the ML-WSe2PL peaks under a magnetic field that is distinct from the pristine case. An intriguing feature is the clear enhancement of the PL intensity that we observe each time the external magnetic field tunes the energy of an exciton in CrSBr into resonance with one of the optical states of WSe2. This result suggests a magnetic field-controlled resonant energy transfer (RET) beyond other effects reported in similar structures. Our work provides deep insight into the importance of different mechanisms in magnetic vdWHs and underscores its great potential for light harvesting and emission enhancement of two-dimensional materials.