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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.

権利情報:

• In Copyright
  

  ©2026 American Physical Society

キーワード: Van der Waals heterostructures, Photoluminescence, Interlayer charge transfer

刊行年月日: 2025-09-03

出版者: American Physical Society (APS)

掲載誌:

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

研究助成金:

• 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

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1103/km88-dxsb

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更新時刻: 2026-07-02 15:55:31 +0900

MDRでの公開時刻: 2026-07-02 18:28:21 +0900