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Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields

Author

Listed:
  • M. Goryca

    (Los Alamos National Lab)

  • J. Li

    (Los Alamos National Lab)

  • A. V. Stier

    (Los Alamos National Lab)

  • T. Taniguchi

    (National Institute for Materials Science)

  • K. Watanabe

    (National Institute for Materials Science)

  • E. Courtade

    (Universite de Toulouse, INSA-CNRS-UPS, LPCNO)

  • S. Shree

    (Universite de Toulouse, INSA-CNRS-UPS, LPCNO)

  • C. Robert

    (Universite de Toulouse, INSA-CNRS-UPS, LPCNO)

  • B. Urbaszek

    (Universite de Toulouse, INSA-CNRS-UPS, LPCNO)

  • X. Marie

    (Universite de Toulouse, INSA-CNRS-UPS, LPCNO)

  • S. A. Crooker

    (Los Alamos National Lab)

Abstract

In semiconductor physics, many essential optoelectronic material parameters can be experimentally revealed via optical spectroscopy in sufficiently large magnetic fields. For monolayer transition-metal dichalcogenide semiconductors, this field scale is substantial—tens of teslas or more—due to heavy carrier masses and huge exciton binding energies. Here we report absorption spectroscopy of monolayer $${{\rm{MoS}}}_{2},{{\rm{MoSe}}}_{2},{{\rm{MoTe}}}_{2}$$ MoS 2 , MoSe 2 , MoTe 2 , and $${{\rm{WS}}}_{2}$$ WS 2 in very high magnetic fields to 91 T. We follow the diamagnetic shifts and valley Zeeman splittings of not only the exciton’s $$1s$$ 1 s ground state but also its excited $$2s,3s,\ldots ,ns$$ 2 s , 3 s , … , n s Rydberg states. This provides a direct experimental measure of the effective (reduced) exciton masses and dielectric properties. Exciton binding energies, exciton radii, and free-particle bandgaps are also determined. The measured exciton masses are heavier than theoretically predicted, especially for Mo-based monolayers. These results provide essential and quantitative parameters for the rational design of opto-electronic van der Waals heterostructures incorporating 2D semiconductors.

Suggested Citation

  • M. Goryca & J. Li & A. V. Stier & T. Taniguchi & K. Watanabe & E. Courtade & S. Shree & C. Robert & B. Urbaszek & X. Marie & S. A. Crooker, 2019. "Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12180-y
    DOI: 10.1038/s41467-019-12180-y
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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.
    3. Shivangi Shree & Delphine Lagarde & Laurent Lombez & Cedric Robert & Andrea Balocchi & Kenji Watanabe & Takashi Taniguchi & Xavier Marie & Iann C. Gerber & Mikhail M. Glazov & Leonid E. Golub & Bernha, 2021. "Interlayer exciton mediated second harmonic generation in bilayer MoS2," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    4. Benjamin Carey & Nils Kolja Wessling & Paul Steeger & Robert Schmidt & Steffen Michaelis de Vasconcellos & Rudolf Bratschitsch & Ashish Arora, 2024. "Giant Faraday rotation in atomically thin semiconductors," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    5. Erfu Liu & Jeremiah Baren & Zhengguang Lu & Takashi Taniguchi & Kenji Watanabe & Dmitry Smirnov & Yia-Chung Chang & Chun Hung Lui, 2021. "Exciton-polaron Rydberg states in monolayer MoSe2 and WSe2," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    6. Shun Feng & Aidan J. Campbell & Mauro Brotons-Gisbert & Daniel Andres-Penares & Hyeonjun Baek & Takashi Taniguchi & Kenji Watanabe & Bernhard Urbaszek & Iann C. Gerber & Brian D. Gerardot, 2024. "Highly tunable ground and excited state excitonic dipoles in multilayer 2H-MoSe2," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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