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Unravelling strong electronic interlayer and intralayer correlations in a transition metal dichalcogenide

Author

Listed:
  • T. J. Whitcher

    (National University of Singapore
    National University of Singapore
    National University of Singapore)

  • Angga Dito Fauzi

    (National University of Singapore
    National University of Singapore)

  • D. Caozheng

    (National University of Singapore)

  • X. Chi

    (National University of Singapore
    National University of Singapore)

  • A. Syahroni

    (University of Indonesia)

  • T. C. Asmara

    (National University of Singapore)

  • M. B. H. Breese

    (National University of Singapore
    National University of Singapore)

  • A. H. Castro Neto

    (National University of Singapore
    National University of Singapore)

  • A. T. S. Wee

    (National University of Singapore
    National University of Singapore)

  • M. Aziz Majidi

    (University of Indonesia)

  • A. Rusydi

    (National University of Singapore
    National University of Singapore
    National University of Singapore
    National University of Singapore)

Abstract

Electronic correlations play important roles in driving exotic phenomena in condensed matter physics. They determine low-energy properties through high-energy bands well-beyond optics. Great effort has been made to understand low-energy excitations such as low-energy excitons in transition metal dichalcogenides (TMDCs), however their high-energy bands and interlayer correlation remain mysteries. Herewith, by measuring temperature- and polarization-dependent complex dielectric and loss functions of bulk molybdenum disulphide from near-infrared to soft X-ray, supported with theoretical calculations, we discover unconventional soft X-ray correlated-plasmons with low-loss, and electronic transitions that reduce dimensionality and increase correlations, accompanied with significantly modified low-energy excitons. At room temperature, interlayer electronic correlations, together with the intralayer correlations in the c-axis, are surprisingly strong, yielding a three-dimensional-like system. Upon cooling, wide-range spectral-weight transfer occurs across a few tens of eV and in-plane p–d hybridizations become enhanced, revealing strong Coulomb correlations and electronic anisotropy, yielding a two-dimensional-like system. Our result shows the importance of strong electronic, interlayer and intralayer correlations in determining electronic structure and opens up applications of utilizing TMDCs on plasmonic nanolithrography.

Suggested Citation

  • T. J. Whitcher & Angga Dito Fauzi & D. Caozheng & X. Chi & A. Syahroni & T. C. Asmara & M. B. H. Breese & A. H. Castro Neto & A. T. S. Wee & M. Aziz Majidi & A. Rusydi, 2021. "Unravelling strong electronic interlayer and intralayer correlations in a transition metal dichalcogenide," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27182-y
    DOI: 10.1038/s41467-021-27182-y
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    References listed on IDEAS

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    1. P. Abbamonte & G. Blumberg & A. Rusydi & A. Gozar & P. G. Evans & T. Siegrist & L. Venema & H. Eisaki & E. D. Isaacs & G. A. Sawatzky, 2004. "Crystallization of charge holes in the spin ladder of Sr14Cu24O41," Nature, Nature, vol. 431(7012), pages 1078-1081, October.
    2. Yuan Cao & Valla Fatemi & Shiang Fang & Kenji Watanabe & Takashi Taniguchi & Efthimios Kaxiras & Pablo Jarillo-Herrero, 2018. "Unconventional superconductivity in magic-angle graphene superlattices," Nature, Nature, vol. 556(7699), pages 43-50, April.
    3. Teguh Citra Asmara & Dongyang Wan & Yongliang Zhao & Muhammad Aziz Majidi & Christopher T. Nelson & Mary C. Scott & Yao Cai & Bixing Yan & Daniel Schmidt & Ming Yang & Tao Zhu & Paolo E. Trevisanutto , 2017. "Tunable and low-loss correlated plasmons in Mott-like insulating oxides," Nature Communications, Nature, vol. 8(1), pages 1-11, August.
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    Cited by:

    1. Mohsen Moazzami Gudarzi & Seyed Hamed Aboutalebi, 2023. "Reassessing the existence of soft X-ray correlated plasmons," Nature Communications, Nature, vol. 14(1), pages 1-3, December.
    2. T. J. Whitcher & A. D. Fauzi & C. Diao & X. Chi & A. Syahroni & T. C. Asmara & M. B. H. Breese & A. H. Castro Neto & A. T. S. Wee & M. A. Majidi & A. Rusydi, 2023. "Reply to: Reassessing the existence of soft X-ray correlated plasmons," Nature Communications, Nature, vol. 14(1), pages 1-4, December.

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