DOE OSTI · 1797328
Non-conventional bell-shaped diffuse scattering in low-energy electron diffraction from high-quality epitaxial 2D-materials
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.
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Omambac, K. (ORCID:0000000250139567), Kriegel, M. (ORCID:0000000155459781), Brand, C. (ORCID:0000000229844456), Finke, B., Kremeyer, L. (ORCID:0000000270912887), Hattab, H., Janoschka, D. (ORCID:000000024311330X), Dreher, P. (ORCID:0000000189751983), Meyer zu Heringdorf, F. -J. (ORCID:0000000258782012), Momeni Pakdehi, D. (ORCID:0000000180512011), Pierz, K. (ORCID:0000000164001799), Schumacher, H. W., Petrović, M. (ORCID:0000000222341207), van Houselt, A. (ORCID:000000022254707X), Poelsema, B., Tringides, M. C. (ORCID:0000000150037280), Horn-von Hoegen, M. (ORCID:0000000303243457). 2021-06-16. Non-conventional bell-shaped diffuse scattering in low-energy electron diffraction from high-quality epitaxial 2D-materials. https://doi.org/10.1063/5.0051220
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