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Imaging local electronic corrugations and doped regions in graphene

Author

Listed:
  • Brian J. Schultz

    (University at Buffalo, State University of New York)

  • Christopher J. Patridge

    (University at Buffalo, State University of New York)

  • Vincent Lee

    (University at Buffalo, State University of New York)

  • Cherno Jaye

    (Material Measurement Laboratory, National Institute of Standards and Technology)

  • Patrick S. Lysaght

    (SEMATECH)

  • Casey Smith

    (SEMATECH)

  • Joel Barnett

    (SEMATECH)

  • Daniel A. Fischer

    (Material Measurement Laboratory, National Institute of Standards and Technology)

  • David Prendergast

    (Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Sarbajit Banerjee

    (University at Buffalo, State University of New York)

Abstract

Electronic structure heterogeneities are ubiquitous in two-dimensional graphene and profoundly impact the transport properties of this material. Here we show the mapping of discrete electronic domains within a single graphene sheet using scanning transmission X-ray microscopy in conjunction with ab initio density functional theory calculations. Scanning transmission X-ray microscopy imaging provides a wealth of detail regarding the extent to which the unoccupied levels of graphene are modified by corrugation, doping and adventitious impurities, as a result of synthesis and processing. Local electronic corrugations, visualized as distortions of the π*cloud, have been imaged alongside inhomogeneously doped regions characterized by distinctive spectral signatures of altered unoccupied density of states. The combination of density functional theory calculations, scanning transmission X-ray microscopy imaging, and in situ near-edge X-ray absorption fine structure spectroscopy experiments also provide resolution of a longstanding debate in the literature regarding the spectral assignments of pre-edge and interlayer states.

Suggested Citation

  • Brian J. Schultz & Christopher J. Patridge & Vincent Lee & Cherno Jaye & Patrick S. Lysaght & Casey Smith & Joel Barnett & Daniel A. Fischer & David Prendergast & Sarbajit Banerjee, 2011. "Imaging local electronic corrugations and doped regions in graphene," Nature Communications, Nature, vol. 2(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:2:y:2011:i:1:d:10.1038_ncomms1376
    DOI: 10.1038/ncomms1376
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    Cited by:

    1. Sasawat Jamnuch & Tod A. Pascal, 2023. "Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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