Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 33: Poster Graphene: Electronic Structure and Excitations
O 33.3: Poster
Tuesday, March 18, 2025, 13:30–15:30, P3
Proximity-effects in epitaxial graphene: recent highlights of our Research Unit FOR5242 — S. Gemming1, I. Gierz-Pehla2, K. Küster3, K. Pierz4, Th. Seyller1, U. Starke3, •C. Tegenkamp1, T. Wehling5, and M. Wenderoth6 — 1Institut für Physik, TU Chemnitz — 2Institut für Experimentelle und Angewandte Physik, U Regensburg — 3Institut für Festkörperforschung, MPI Stuttgart — 4Physikalisch-Technische Bundesanstalt, Braunschweig — 5Institut für Theoretische Physik, U Hamburg — 6IV. Physikalische Institut, U Göttingen
Proximity effects in low dimensional electron gases are essential for the design of new quantum materials with tailored electronic, magnetic and optical properties. A recent example is superconductivity in twisted bilayer graphene. Our Research Unit FOR 5242 studies the influence of proximity-induced spin-orbit interaction (SOI), electronic correlations as well as local electric fields on 2D electron gases, using epitaxial graphene (EG) on SiC substrates as a model system. EG is known for its flexible functionalization schemes including intercalation and adsorption, enabling control of the doping level, hybridization effects, and the strength of the Coulomb interaction. Here, we highlight a few of our recent results including (1) the use of EG for quantum Hall resistance standards, (2) SOI in graphene induced by 2D Pb layers, (3) Mott-Hubbard physics realized by the intercalation of Sn and Si, (4) many-body effects in extremely doped EG and (5) novel 2D interface layers. For further details see www.for5242.de
Keywords: Proximity coupling; epitaxial graphene; intercalation; Mott physics