Multiband charge density wave exposed in a transition metal dichalcogenide

  title={Multiband charge density wave exposed in a transition metal dichalcogenide},
  author={{\'A}rp{\'a}d P{\'a}sztor and Alessandro Scarfato and Marcello Spera and Felix Flicker and C{\'e}line Barreteau and Enrico Giannini and Jasper van Wezel and Ch. Renner},
  journal={Nature Communications},
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… 
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