Corpus ID: 235422616

Inherently high valley polarizations of momentum-forbidden dark excitons in transition-metal dichalcogenide monolayers

@inproceedings{Lo2021InherentlyHV,
  title={Inherently high valley polarizations of momentum-forbidden dark excitons in transition-metal dichalcogenide monolayers},
  author={Ping-Yuan Lo and Guan-Hao Peng and Wei-Hua Li and Yi Yang and Shun-Jen Cheng},
  year={2021}
}
High degree of valley polarization of optically active excitons in transition-metal dichalcogenide monolayers (TMD-MLs) is vital in valley-based photonic applications but known to be likely spoiled by the intrinsic electron-hole exchange interactions. In this study, we present a theoretical investigation of the valley and optical properties of finite-momentum dark excitons in WSe2-MLs by solving the density-functional-theory(DFT)-based Bethe-Salpeter equation (BSE) under the guidance of… Expand

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