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HL: Fachverband Halbleiterphysik

HL 33: Poster II

HL 33.6: Poster

Mittwoch, 29. März 2023, 17:00–19:00, P1

Transport and optical characterization of electrically contacted monolayer TMDCs — •Jan-Niklas Heidkamp, Johannes Krause, Swarup Deb, Rico Schwartz, and Tobias Korn — Institute of Physics, University of Rostock, Rostock, Germany

Since Graphene was introduced in 2004, there has been a great interest in other 2D materials as well. Among the most studied is the group of semiconducting transition metal dichalcogenides (TMDCs). The band structure of these crystals changes from an indirect gap in the bulk to a direct gap in the monolayer limit. Herein, a method for contacting monolayer flakes using photolithography and lift-off processes is showcased. Electrical contacts are pre-defined on SiO₂ substrates and thereafter, TMDC flakes are deposited using a deterministic transfer technique. Flakes of the TMDC WS₂ contacted in this way are characterized via gate-dependent photoluminescence measurements and I-V curves.