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説明:

We report the direct observation that optically generated spin-valley polarization in a monolayer can be transferred between layers of 2D MoSe2-WSe2 heterostructures. Using nondegenerate optical circular dichroism spectroscopy, we show that charge transfer between two monolayers conserves spins, which is robust against twist angle between layers. Analyzing the line shapes of the circular dichroism spectra reveals the formation of positively and negatively charged valley excitons due to spin-valley transfer in WSe2 and MoSe2, respectively. This demonstrates directional pumping of spin polarized carriers into individual layers, i.e. polarized hole spins into WSe2 and electron spins into MoSe2.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Two-dimensional semiconductors, spin-valley physics, optoelectronic device

刊行年月日: 2016-12-14

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 7 issue. 1 13747

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/ncomms13747

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更新時刻: 2025-02-27 16:30:51 +0900

MDRでの公開時刻: 2025-02-27 16:30:51 +0900