Non-conventional bell-shaped diffuse scattering in low-energy electron diffraction from high-quality epitaxial 2D-materials

K. Omambac, M. Kriegel, C. Brand, B. Finke, L. Kremeyer, H. Hattab, D. Janoschka, P. Dreher, F. J. Meyer zu Heringdorf, D. Momeni Pakdehi, K. Pierz, H. W. Schumacher, M. Petrović, A. van Houselt, B. Poelsema, M. C. Tringides, M. Horn-Von Hoegen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

A broad, bell-shaped intensity component is observed in low-energy electron diffraction from high-quality epitaxial 2D-systems. Three 2D-systems, graphene on Ir(111), graphene on SiC(0001), and hexagonal boron nitride on Ir(111), have been prepared in situ under ultra-high vacuum conditions. In all three systems—independent of substrate material—similar strong diffuse intensity is observed, exhibiting a width as large as 50% of the Brillouin zone and an integrated intensity more than 10 times the intensity of the Bragg spots. The presented experimental results provide evidence for a common origin of such diffuse diffraction intensity in different atomically thin 2D-materials.

Original languageEnglish
Article number241902
JournalApplied physics letters
Volume118
Issue number24
DOIs
Publication statusPublished - 14 Jun 2021

Keywords

  • 22/2 OA procedure

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