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Charge-tuneable biexciton complexes in monolayer WSe2

Author

Listed:
  • Matteo Barbone

    (University of Cambridge, JJ Thomson Ave.
    University of Cambridge)

  • Alejandro R.-P. Montblanch

    (University of Cambridge, JJ Thomson Ave.)

  • Dhiren M. Kara

    (University of Cambridge, JJ Thomson Ave.)

  • Carmen Palacios-Berraquero

    (University of Cambridge, JJ Thomson Ave.)

  • Alisson R. Cadore

    (University of Cambridge)

  • Domenico De Fazio

    (University of Cambridge)

  • Benjamin Pingault

    (University of Cambridge, JJ Thomson Ave.)

  • Elaheh Mostaani

    (University of Cambridge)

  • Han Li

    (Transport and Energy, Arizona State University)

  • Bin Chen

    (Transport and Energy, Arizona State University)

  • Kenji Watanabe

    (National Institute for Materials Science)

  • Takashi Taniguchi

    (National Institute for Materials Science)

  • Sefaattin Tongay

    (Transport and Energy, Arizona State University)

  • Gang Wang

    (University of Cambridge)

  • Andrea C. Ferrari

    (University of Cambridge)

  • Mete Atatüre

    (University of Cambridge, JJ Thomson Ave.)

Abstract

Monolayer transition metal dichalcogenides have strong Coulomb-mediated many-body interactions. Theoretical studies have predicted the existence of numerous multi-particle excitonic states. Two-particle excitons and three-particle trions have been identified by their optical signatures. However, more complex states such as biexcitons have been elusive due to limited spectral quality of the optical emission. Here, we report direct evidence of two biexciton complexes in monolayer tungsten diselenide: the four-particle neutral biexciton and the five-particle negatively charged biexciton. We distinguish these states by power-dependent photoluminescence and demonstrate full electrical switching between them. We determine the band states of the elementary particles comprising the biexcitons through magneto-optical spectroscopy. We also resolve a splitting of 2.5 meV for the neutral biexciton, which we attribute to the fine structure, providing reference for subsequent studies. Our results unveil the nature of multi-exciton complexes in transitionmetal dichalcogenides and offer direct routes towards deterministic control in many-body quantum phenomena.

Suggested Citation

  • Matteo Barbone & Alejandro R.-P. Montblanch & Dhiren M. Kara & Carmen Palacios-Berraquero & Alisson R. Cadore & Domenico De Fazio & Benjamin Pingault & Elaheh Mostaani & Han Li & Bin Chen & Kenji Wata, 2018. "Charge-tuneable biexciton complexes in monolayer WSe2," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05632-4
    DOI: 10.1038/s41467-018-05632-4
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    Cited by:

    1. Jack B. Muir & Jesper Levinsen & Stuart K. Earl & Mitchell A. Conway & Jared H. Cole & Matthias Wurdack & Rishabh Mishra & David J. Ing & Eliezer Estrecho & Yuerui Lu & Dmitry K. Efimkin & Jonathan O., 2022. "Interactions between Fermi polarons in monolayer WS2," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Ke Wei & Qirui Liu & Yuxiang Tang & Yingqian Ye & Zhongjie Xu & Tian Jiang, 2023. "Charged biexciton polaritons sustaining strong nonlinearity in 2D semiconductor-based nanocavities," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Artem N. Abramov & Igor Y. Chestnov & Ekaterina S. Alimova & Tatiana Ivanova & Ivan S. Mukhin & Dmitry N. Krizhanovskii & Ivan A. Shelykh & Ivan V. Iorsh & Vasily Kravtsov, 2023. "Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe2," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    4. Kai-Qiang Lin & Jonas D. Ziegler & Marina A. Semina & Javid V. Mamedov & Kenji Watanabe & Takashi Taniguchi & Sebastian Bange & Alexey Chernikov & Mikhail M. Glazov & John M. Lupton, 2022. "High-lying valley-polarized trions in 2D semiconductors," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    5. Pablo Hernández López & Sebastian Heeg & Christoph Schattauer & Sviatoslav Kovalchuk & Abhijeet Kumar & Douglas J. Bock & Jan N. Kirchhof & Bianca Höfer & Kyrylo Greben & Denis Yagodkin & Lukas Linhar, 2022. "Strain control of hybridization between dark and localized excitons in a 2D semiconductor," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    6. Xiaotong Chen & Zhen Lian & Yuze Meng & Lei Ma & Su-Fei Shi, 2023. "Excitonic Complexes in Two-Dimensional Transition Metal Dichalcogenides," Nature Communications, Nature, vol. 14(1), pages 1-5, December.

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