2019/08/09 by S. Chen, Shen Chen, M. Horn von Hoegen +3 · 23 citations
Materials Science · Physics and Astronomy · #Diffraction #Graphene #Graphene research and applications #Materials science #Metamaterials and Metasurfaces Applications #Nanotechnology #Optics #Physics #Quality (philosophy) #Quantum mechanics #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.100.155307
published in Physical review. B./Physical review. B 100(15) (American Physical Society)
arxiv created 2019/08/09 · openalex created_date 2019/08/22 · openalex publication_date 2019/10/23 · arxiv updated 2019/10/30 · openalex updated_date 2026/08/05
The realization of the unusual properties of two-dimensional (2D) materials requires the formation of large domains of single-layer thickness, extending over the mesoscale. It is found that the formation of uniform graphene on SiC, contrary to textbook diffraction, is signaled by a strong bell-shaped component (BSC) around the (00) and G(10) spots (but not around the substrate spots). The BCS is also seen on graphene grown on metals, because a single uniform graphene layer can be also grown with large lateral size. It is only seen by electron diffraction but not with x-ray or He scattering. Although the origin of such an intriguing result is unclear, its presence in the earlier literature (but never mentioned) points to its robustness and significance. A likely mechanism relates to the the spatial confinement of the graphene electrons, within a single layer. This leads to large spread in their wave vector which is transferred by electron-electron interactions to the elastically scattered electrons to generate the BSC.