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Determination of band alignment in the single-layer MoS2/WSe2 heterojunction

Author

Listed:
  • Ming-Hui Chiu

    (Institute of Atomic and Molecular Sciences, Academia Sinica)

  • Chendong Zhang

    (University of Texas at Austin)

  • Hung-Wei Shiu

    (National Synchrotron Radiation Research Center)

  • Chih-Piao Chuu

    (Institute of Atomic and Molecular Sciences, Academia Sinica)

  • Chang-Hsiao Chen

    (Institute of Atomic and Molecular Sciences, Academia Sinica)

  • Chih-Yuan S. Chang

    (Institute of Atomic and Molecular Sciences, Academia Sinica)

  • Chia-Hao Chen

    (National Synchrotron Radiation Research Center)

  • Mei-Yin Chou

    (Institute of Atomic and Molecular Sciences, Academia Sinica
    School of Physics, Georgia Institute of Technology
    Deapartment of Physics, National Taiwan University)

  • Chih-Kang Shih

    (University of Texas at Austin)

  • Lain-Jong Li

    (Institute of Atomic and Molecular Sciences, Academia Sinica
    King Abdullah University of Science and Technology)

Abstract

The emergence of two-dimensional electronic materials has stimulated proposals of novel electronic and photonic devices based on the heterostructures of transition metal dichalcogenides. Here we report the determination of band offsets in the heterostructures of transition metal dichalcogenides by using microbeam X-ray photoelectron spectroscopy and scanning tunnelling microscopy/spectroscopy. We determine a type-II alignment between MoS2 and WSe2 with a valence band offset value of 0.83 eV and a conduction band offset of 0.76 eV. First-principles calculations show that in this heterostructure with dissimilar chalcogen atoms, the electronic structures of WSe2 and MoS2 are well retained in their respective layers due to a weak interlayer coupling. Moreover, a valence band offset of 0.94 eV is obtained from density functional theory, consistent with the experimental determination.

Suggested Citation

  • Ming-Hui Chiu & Chendong Zhang & Hung-Wei Shiu & Chih-Piao Chuu & Chang-Hsiao Chen & Chih-Yuan S. Chang & Chia-Hao Chen & Mei-Yin Chou & Chih-Kang Shih & Lain-Jong Li, 2015. "Determination of band alignment in the single-layer MoS2/WSe2 heterojunction," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8666
    DOI: 10.1038/ncomms8666
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    Cited by:

    1. Suman Chatterjee & Medha Dandu & Pushkar Dasika & Rabindra Biswas & Sarthak Das & Kenji Watanabe & Takashi Taniguchi & Varun Raghunathan & Kausik Majumdar, 2023. "Harmonic to anharmonic tuning of moiré potential leading to unconventional Stark effect and giant dipolar repulsion in WS2/WSe2 heterobilayer," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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