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Nanoscale mapping of quasiparticle band alignment

Author

Listed:
  • Søren Ulstrup

    (Aarhus University)

  • Cristina E. Giusca

    (National Physical Laboratory)

  • Jill A. Miwa

    (Aarhus University)

  • Charlotte E. Sanders

    (STFC Rutherford Appleton Laboratory)

  • Alex Browning

    (National Physical Laboratory)

  • Pavel Dudin

    (Division of Science)

  • Cephise Cacho

    (Division of Science)

  • Olga Kazakova

    (National Physical Laboratory)

  • D. Kurt Gaskill

    (U.S. Naval Research Laboratory)

  • Rachael L. Myers-Ward

    (U.S. Naval Research Laboratory)

  • Tianyi Zhang

    (The Pennsylvania State University)

  • Mauricio Terrones

    (The Pennsylvania State University)

  • Philip Hofmann

    (Aarhus University)

Abstract

Control of atomic-scale interfaces between materials with distinct electronic structures is crucial for the design and fabrication of most electronic devices. In the case of two-dimensional materials, disparate electronic structures can be realized even within a single uniform sheet, merely by locally applying different vertical gate voltages. Here, we utilize the inherently nano-structured single layer and bilayer graphene on silicon carbide to investigate lateral electronic structure variations in an adjacent single layer of tungsten disulfide (WS2). The electronic band alignments are mapped in energy and momentum space using angle-resolved photoemission with a spatial resolution on the order of 500 nm (nanoARPES). We find that the WS2 band offsets track the work function of the underlying single layer and bilayer graphene, and we relate such changes to observed lateral patterns of exciton and trion luminescence from WS2.

Suggested Citation

  • Søren Ulstrup & Cristina E. Giusca & Jill A. Miwa & Charlotte E. Sanders & Alex Browning & Pavel Dudin & Cephise Cacho & Olga Kazakova & D. Kurt Gaskill & Rachael L. Myers-Ward & Tianyi Zhang & Mauric, 2019. "Nanoscale mapping of quasiparticle band alignment," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11253-2
    DOI: 10.1038/s41467-019-11253-2
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    Cited by:

    1. Søren Ulstrup & Yann in ’t Veld & Jill A. Miwa & Alfred J. H. Jones & Kathleen M. McCreary & Jeremy T. Robinson & Berend T. Jonker & Simranjeet Singh & Roland J. Koch & Eli Rotenberg & Aaron Bostwick , 2024. "Observation of interlayer plasmon polaron in graphene/WS2 heterostructures," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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