Effect of spin-dependent tunneling in a <math display=

Annika Bergmann-Iwe; Swarup Deb; Klaus Zollner; Veronika Schneidt; Mustafa Hemaid; Kenji Watanabe; Takashi Taniguchi; Rico Schwartz; Jaroslav Fabian; Tobias Korn

doi:10.1103/km88-dxsb

Journal article Effect of spin-dependent tunneling in a ${Mo Se}_{2} / {Cr}_{2} {Ge}_{2} {Te}_{6}$ van der Waals heterostructure on exciton and trion emission

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2025A01280G_Paper-CGT-PRA-3rdRevision-Accepted.pdf

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Annika Bergmann-Iwe, Swarup Deb, Klaus Zollner, Veronika Schneidt, Mustafa Hemaid, Kenji Watanabe, Takashi Taniguchi, Rico Schwartz, Jaroslav Fabian, Tobias Korn. Effect of spin-dependent tunneling in a

{Mo Se}_{2} / {Cr}_{2} {Ge}_{2} {Te}_{6}

van der Waals heterostructure on exciton and trion emission. Physical Review Applied. 2025, 24 (3), 034008. https://doi.org/10.1103/km88-dxsb

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(abstract)

We study van der Waals heterostructures consisting of monolayer Mo⁢Se2 and few-layer Cr2⁢Ge2⁢Te6 fully encapsulated in hexagonal boron nitride using low-temperature photoluminescence and polar magneto-optical Kerr-effect measurements. Photoluminescence characterization reveals a partial quenching and a change of the exciton-trion emission ratio in the heterostructure as compared to the isolated Mo⁢Se2 monolayer. Under circularly polarized excitation, we find that the exciton-trion emission ratio depends on the relative orientation of excitation helicity and Cr2⁢Ge2⁢Te6 magnetization, even though the photoluminescence emission itself is unpolarized. This observation hints at an ultrafast, spin-dependent interlayer charge transfer that competes with exciton and trion formation and recombination.

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©2026 American Physical Society

Keyword: Van der Waals heterostructures, Photoluminescence, Interlayer charge transfer

Date published: 2025-09-03

Publisher: American Physical Society (APS)

Journal:

Physical Review Applied (ISSN: 23317019) vol. 24 issue. 3 034008

Funding:

FLAGERA
World Premier International Research Center Initiative (WPI), MEXT, Japan
Humboldt Foundation
Deutsche Forschungsgemeinschaft SFB1477
Deutsche Forschungsgemeinschaft SPP2244
Deutsche Forschungsgemeinschaft KO3612/7-1
Deutsche Forschungsgemeinschaft KO3612/8-1
European Union Horizon 2020 Research and Innovation Program
JSPS KAKENHI 21H05233
JSPS KAKENHI 23H02052

Manuscript type: Author's version (Accepted manuscript)

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First published URL: https://doi.org/10.1103/km88-dxsb

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Updated at: 2026-07-02 15:55:31 +0900

Published on MDR: 2026-07-02 18:28:21 +0900

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