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O: Fachverband Oberflächenphysik
O 18: Poster: 2D Materials I
O 18.4: Poster
Monday, March 27, 2023, 18:00–20:00, P2/EG
Growth and characterization of transition metal dichalcogenides on Au(111) grown by chemical vapor deposition — •Julian Picker1, Felix Otto2, Ziyang Gan1, Maximilian Schaal2, Marco Gruenewald2, Christof Neumann1, Antony George1, Roman Forker2, Torsten Fritz2, and Andrey Turchanin1 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstraße 10, 07743 Jena, Germany — 2Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany
Transition metal dichalcogenides (TMDs) are layered two-dimensional (2D) materials which have attracted significant attention in recent years. Especially, the exciting properties of their monolayers such as the strong, direct bandgap photoluminescence make them promising for novel electronic and optoelectronic applications. Here, we demonstrate the ex-vacuo growth of different TMD monolayers on Au(111) by chemical vapor deposition (CVD). Afterwards, the samples were analyzed in ultra-high vacuum (UHV) with the help of surface sensitive methods, including (low-temperature) scanning tunneling microscopy and spectroscopy (STM/STS), low-energy electron diffraction (LEED), as well as X-ray and angle-resolved ultraviolet photoelectron spectroscopy (XPS/ARPES). While we confirm the formation of high-quality TMDs, we also accessed the structural and electronic properties of these samples down to the atomic scale. In particular, the focus is on the interaction of the TMDs and Au(111) as Au is the most widely used electrical contact material for TMD devices.