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Multiband charge density wave exposed in a transition metal dichalcogenide

Author

Listed:
  • Árpád Pásztor

    (Université de Genève)

  • Alessandro Scarfato

    (Université de Genève)

  • Marcello Spera

    (Université de Genève)

  • Felix Flicker

    (University of Oxford
    Cardiff University
    University of Bristol)

  • Céline Barreteau

    (Université de Genève)

  • Enrico Giannini

    (Université de Genève)

  • Jasper van Wezel

    (University of Amsterdam)

  • Christoph Renner

    (Université de Genève)

Abstract

In the presence of multiple bands, well-known electronic instabilities may acquire new complexity. While multiband superconductivity is the subject of extensive studies, the possibility of multiband charge density waves (CDWs) has been largely ignored so far. Here, combining energy dependent scanning tunnelling microscopy (STM) topography with a simple model of the charge modulations and a self-consistent calculation of the CDW gap, we find evidence for a multiband CDW in 2H-NbSe2. This CDW not only involves the opening of a gap on the inner band around the K-point, but also on the outer band. This leads to spatially out-of-phase charge modulations from electrons on these two bands, which we detect through a characteristic energy dependence of the CDW contrast in STM images.

Suggested Citation

  • Árpád Pásztor & Alessandro Scarfato & Marcello Spera & Felix Flicker & Céline Barreteau & Enrico Giannini & Jasper van Wezel & Christoph Renner, 2021. "Multiband charge density wave exposed in a transition metal dichalcogenide," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25780-4
    DOI: 10.1038/s41467-021-25780-4
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    References listed on IDEAS

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    1. Felix Flicker & Jasper van Wezel, 2015. "Charge order from orbital-dependent coupling evidenced by NbSe2," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
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