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Indirect excitons in van der Waals heterostructures at room temperature

Author

Listed:
  • E. V. Calman

    (University of California at San Diego)

  • M. M. Fogler

    (University of California at San Diego)

  • L. V. Butov

    (University of California at San Diego)

  • S. Hu

    (University of Manchester)

  • A. Mishchenko

    (University of Manchester)

  • A. K. Geim

    (University of Manchester)

Abstract

Indirect excitons (IXs) are explored both for studying quantum Bose gases in semiconductor materials and for the development of excitonic devices. IXs were extensively studied in III–V and II–VI semiconductor heterostructures where IX range of existence has been limited to low temperatures. Here, we present the observation of IXs at room temperature in van der Waals transition metal dichalcogenide (TMD) heterostructures. This is achieved in TMD heterostructures based on monolayers of MoS2 separated by atomically thin hexagonal boron nitride. The IXs we realize in the TMD heterostructure have lifetimes orders of magnitude longer than lifetimes of direct excitons in single-layer TMD and their energy is gate controlled. The realization of IXs at room temperature establishes the TMD heterostructures as a material platform both for a field of high-temperature quantum Bose gases of IXs and for a field of high-temperature excitonic devices.

Suggested Citation

  • E. V. Calman & M. M. Fogler & L. V. Butov & S. Hu & A. Mishchenko & A. K. Geim, 2018. "Indirect excitons in van der Waals heterostructures at room temperature," Nature Communications, Nature, vol. 9(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04293-7
    DOI: 10.1038/s41467-018-04293-7
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    Cited by:

    1. Ruishi Qi & Andrew Y. Joe & Zuocheng Zhang & Yongxin Zeng & Tiancheng Zheng & Qixin Feng & Jingxu Xie & Emma Regan & Zheyu Lu & Takashi Taniguchi & Kenji Watanabe & Sefaattin Tongay & Michael F. Cromm, 2023. "Thermodynamic behavior of correlated electron-hole fluids in van der Waals heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Simon Raiber & Paulo E. Faria Junior & Dennis Falter & Simon Feldl & Petter Marzena & Kenji Watanabe & Takashi Taniguchi & Jaroslav Fabian & Christian Schüller, 2022. "Ultrafast pseudospin quantum beats in multilayer WSe2 and MoSe2," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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