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O: Fachverband Oberflächenphysik
O 72: Poster: Scanning Probe Microscopy: Light Matter Interaction at Atomic Scales
O 72.12: Poster
Mittwoch, 20. März 2024, 18:00–20:00, Poster D
Theoretical Study of Electronic and Optical Properties in Modified Graphene Nanoribbons — •Jian Cheng Wong1, Jiang Song2, Sofia Canola1, Alex Boeglin2, Guillaume Schull2, and Tomáš Neuman1 — 1Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 16200 Prague, Czech Republic — 2Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France
The electronic and optical properties of graphene nanoribbons (GNRs) depend on geometric configurations such as width and edge structure. The spin properties of these GNRs have been widely studied both theoretically and by scanning tunneling microscopy experiments. However, studies exploring their optical properties remain scarce. Scanning tunneling microscopy-induced luminescence (STML) provides sub-nanometer-scale spatial resolution to study these properties using light emitted from the sample. Pioneering STML studies [1] on modified GNRs unravel localized excitations that exhibit interesting optical properties. Despite this recent experimental progress, comprehensive theoretical description of these optical excitations in structures of varying size and geometry remains to be theoretically explored. Using first-principles electronic structure methods, we elucidate the electronic and optical properties of these localized excitations.
[1] Song et al., Science, 379(6636), 1049-1054 (2023).
Keywords: Scanning tunneling microscopy; First-principles computational methods; Graphene; Light-matter interaction