Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 29: Transport: Poster Session
TT 29.10: Poster
Donnerstag, 8. September 2022, 15:00–18:00, P1
Interaction effects in graphene/2D polymer heterostructures — •Francesca Falorsi1, Kejun Liu2, Miroslav Polozij2, Christian Eckel1, Thomas Heine2, Xinliang Feng2, Renhao Dong2, and Thomas Weitz1 — 1I. Physical Institute -Georg-August-University, Friedrich-Hund-Platz 1 37077 Göttingen Göttingen — 2Faculty of chemistry and food chemistry, Technische Universität Dresden, Mommsenstraße 4 01069 Dresden
This work explores the interlayer interaction effects of van-der-Walls heterostructures (HS) formed by graphene and a new class of two-dimensional polymers bonded by covalent bonds (C2DPs). These materials can be synthesized with multiple compositions and topology and therefore offer large tunability of their electronic properties. Via density functional theory calculations, it was possible to predict that coupling of different C2DPs with monolayer graphene should generate new interesting physical phenomena, including band flattening and trivial and non-trivial bandgap opening. The first system studied is the HSs formed by a mechanically exfoliated graphene on top of a C2DP that comprises metal-free porphyrin and perylene units linked by imide bonds. Different techniques are used for the first characterization of the structure: Raman, KPFM, SNOM, and ARPES. These different measurement techniques indicate the existence of interaction effects in the HSs. Electrical measurements on the HSs were also performed and showed that the polymer highly p-dopes the graphene.