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Coulomb engineering of the bandgap and excitons in two-dimensional materials

Author

Listed:
  • Archana Raja

    (Columbia University
    Columbia University
    Stanford University
    SLAC National Accelerator Laboratory)

  • Andrey Chaves

    (Columbia University
    Universidade Federal do Ceará)

  • Jaeeun Yu

    (Columbia University)

  • Ghidewon Arefe

    (Columbia University)

  • Heather M. Hill

    (Columbia University
    Stanford University)

  • Albert F. Rigosi

    (Columbia University
    Stanford University)

  • Timothy C. Berkelbach

    (University of Chicago)

  • Philipp Nagler

    (University of Regensburg)

  • Christian Schüller

    (University of Regensburg)

  • Tobias Korn

    (University of Regensburg)

  • Colin Nuckolls

    (Columbia University)

  • James Hone

    (Columbia University)

  • Louis E. Brus

    (Columbia University)

  • Tony F. Heinz

    (Columbia University
    Stanford University
    SLAC National Accelerator Laboratory)

  • David R. Reichman

    (Columbia University)

  • Alexey Chernikov

    (Columbia University
    University of Regensburg)

Abstract

The ability to control the size of the electronic bandgap is an integral part of solid-state technology. Atomically thin two-dimensional crystals offer a new approach for tuning the energies of the electronic states based on the unusual strength of the Coulomb interaction in these materials and its environmental sensitivity. Here, we show that by engineering the surrounding dielectric environment, one can tune the electronic bandgap and the exciton binding energy in monolayers of WS2 and WSe2 by hundreds of meV. We exploit this behaviour to present an in-plane dielectric heterostructure with a spatially dependent bandgap, as an initial step towards the creation of diverse lateral junctions with nanoscale resolution.

Suggested Citation

  • Archana Raja & Andrey Chaves & Jaeeun Yu & Ghidewon Arefe & Heather M. Hill & Albert F. Rigosi & Timothy C. Berkelbach & Philipp Nagler & Christian Schüller & Tobias Korn & Colin Nuckolls & James Hone, 2017. "Coulomb engineering of the bandgap and excitons in two-dimensional materials," Nature Communications, Nature, vol. 8(1), pages 1-7, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15251
    DOI: 10.1038/ncomms15251
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    Cited by:

    1. Shuai Zhang & Baichang Li & Xinzhong Chen & Francesco L. Ruta & Yinming Shao & Aaron J. Sternbach & A. S. McLeod & Zhiyuan Sun & Lin Xiong & S. L. Moore & Xinyi Xu & Wenjing Wu & Sara Shabani & Lin Zh, 2022. "Nano-spectroscopy of excitons in atomically thin transition metal dichalcogenides," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Shengcong Shang & Changsheng Du & Youxing Liu & Minghui Liu & Xinyu Wang & Wenqiang Gao & Ye Zou & Jichen Dong & Yunqi Liu & Jianyi Chen, 2022. "A one-dimensional conductive metal-organic framework with extended π-d conjugated nanoribbon layers," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Dogyeong Kim & Sol Lee & Jiwon Park & Jinho Lee & Hee Cheul Choi & Kwanpyo Kim & Sunmin Ryu, 2023. "In-plane and out-of-plane excitonic coupling in 2D molecular crystals," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. 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.
    5. Yanhao Tang & Jie Gu & Song Liu & Kenji Watanabe & Takashi Taniguchi & James C. Hone & Kin Fai Mak & Jie Shan, 2022. "Dielectric catastrophe at the Wigner-Mott transition in a moiré superlattice," Nature Communications, Nature, vol. 13(1), pages 1-7, 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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