Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 94: Focus Session: Proximity Effects in Epitaxial Graphene I
O 94.4: Vortrag
Donnerstag, 21. März 2024, 16:00–16:15, MA 141
Electronic structure of intercalated epitaxial graphene: A first principles study — •Andres Unigarro1, Florian Günther2, Franziska Schölzel1, Niklas Witt3, Thomas Seyller1, Tim Wehling3, and Sibylle Gemming1 — 1Institute of physics, TU Chemnitz, Chemnitz, Germany — 2UNESP, Rio Claro, Brazil — 3Universität Hamburg, Hamburg, Germany
Two-dimensional materials such as graphene are fascinating because they combine unique mechanical and electronic properties. Proximity effects introduced from the interaction with intercalates and intercalation layers change the electronic, optical and transport properties of epitaxial graphene (EG) while preserving the regular honeycomb structure. Elements of the IV group such as Pb can be used as intercalants below a graphene sheet, leading to partly well-defined hetero bilayer with different functionalities. Heavy atoms like Pb furthermore, promise to introduce additional effects such as spin-orbit coupling to the electron gas of graphene. Using a density functional based tight binding approach, we investigate the modifications in the electronic structure of EG due to proximity effects induced by intercalation.
Keywords: DFTB; Graphene; Intercalation; Band structure