npj 2D Materials and Applications (Sep 2024)

Probing the interplay of interactions, screening and strain in monolayer MoS2 via self-intercalation

  • Borna Pielić,
  • Matko Mužević,
  • Dino Novko,
  • Jiaqi Cai,
  • Alice Bremerich,
  • Robin Ohmann,
  • Marko Kralj,
  • Iva Šrut Rakić,
  • Carsten Busse

DOI
https://doi.org/10.1038/s41699-024-00488-3
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 7

Abstract

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Abstract Controlling many-body interactions in two-dimensional systems remains a formidable task from the perspective of both fundamental physics and application. Here, we explore remarkable electronic structure alterations of MoS2 monolayer islands on graphene on Ir(111) induced by non-invasive self-intercalation. This introduces significant differences in morphology and strain of MoS2 as a result of the modified interaction with the substrate. Consequently, considerable changes of the band gap and non-rigid electronic shifts of valleys are detected, which are a combined effect of the screening of the many-body interactions and strain in MoS2. Furthermore, theory shows that each substrate leaves a unique stamp on the electronic structure of two-dimensional material in terms of those two parameters, restricted by their correlation.