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Quantifying electronic band interactions in van der Waals materials using angle-resolved reflected-electron spectroscopy

Author

Listed:
  • Johannes Jobst

    (Huygens-Kamerlingh Onnes Laboratorium, Leiden Institute of Physics, Leiden University
    Columbia University)

  • Alexander J. H. van der Torren

    (Huygens-Kamerlingh Onnes Laboratorium, Leiden Institute of Physics, Leiden University)

  • Eugene E. Krasovskii

    (Universidad del Pais Vasco UPV/EHU
    IKERBASQUE, Basque Foundation for Science
    Donostia International Physics Center (DIPC))

  • Jesse Balgley

    (Columbia University)

  • Cory R. Dean

    (Columbia University)

  • Rudolf M. Tromp

    (Huygens-Kamerlingh Onnes Laboratorium, Leiden Institute of Physics, Leiden University
    IBM T.J. Watson Research Center)

  • Sense Jan van der Molen

    (Huygens-Kamerlingh Onnes Laboratorium, Leiden Institute of Physics, Leiden University)

Abstract

High electron mobility is one of graphene’s key properties, exploited for applications and fundamental research alike. Highest mobility values are found in heterostructures of graphene and hexagonal boron nitride, which consequently are widely used. However, surprisingly little is known about the interaction between the electronic states of these layered systems. Rather pragmatically, it is assumed that these do not couple significantly. Here we study the unoccupied band structure of graphite, boron nitride and their heterostructures using angle-resolved reflected-electron spectroscopy. We demonstrate that graphene and boron nitride bands do not interact over a wide energy range, despite their very similar dispersions. The method we use can be generally applied to study interactions in van der Waals systems, that is, artificial stacks of layered materials. With this we can quantitatively understand the ‘chemistry of layers’ by which novel materials are created via electronic coupling between the layers they are composed of.

Suggested Citation

  • Johannes Jobst & Alexander J. H. van der Torren & Eugene E. Krasovskii & Jesse Balgley & Cory R. Dean & Rudolf M. Tromp & Sense Jan van der Molen, 2016. "Quantifying electronic band interactions in van der Waals materials using angle-resolved reflected-electron spectroscopy," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13621
    DOI: 10.1038/ncomms13621
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