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Article Dans Une Revue Applied Physics Letters Année : 2021

Spin dependent charge transfer in MoSe 2 /hBN/Ni hybrid structures

C. Robert
Thomas Blon
Yuan Lu
K. Watanabe

Résumé

We present magneto-photoluminescence measurements in a hybrid 2D semiconductor/ ferromagnetic structure consisting of MoSe2/hBN/Ni. When the Nickel layer is magnetized, we observe circularly polarized photoluminescence of the trion peak in MoSe2 monolayer under linearly polarized excitation. This build-up of circular polarization can reach a measured value of about 4% when the magnetization of Ni is saturated perpendicularly to the sample plane, and changes its sign when the magnetization is reversed. The circular polarization decreases when the hBN barrier thickness increases. These results are interpreted in terms of a spin-dependent charge transfer between the MoSe2 monolayer and the Nickel film. The build-up of circular polarization is observed up to 120 K, mainly limited by the trion emission that vanishes with temperature.
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Dates et versions

hal-03609118 , version 1 (15-03-2022)

Identifiants

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H. Tornatzky, C. Robert, Pierre Renucci, B. Han, Thomas Blon, et al.. Spin dependent charge transfer in MoSe 2 /hBN/Ni hybrid structures. Applied Physics Letters, 2021, 119 (26), pp.263103. ⟨10.1063/5.0075554⟩. ⟨hal-03609118⟩
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