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HL: Fachverband Halbleiterphysik

HL 22: 2D Materials IV (joint session HL/CPP)

HL 22.9: Vortrag

Mittwoch, 29. März 2023, 12:00–12:15, POT 81

From MoSe₂ to MoS₂ and everything in-between — •Jennifer Schmeink, Vladislav Musytschuk, Nicolas Hille, Erik Pollmann, Peter Kratzer, and Marika Schleberger — Universität Duisburg-Essen, Fakultät für Physik, Germany

Asymmetrical, or Janus transition metal dichalcogenide (TMDC) monolayers such as MoSSe are a current hot topic in the field of two-dimensional (2D) materials due to their unique properties. The most common approach of fabrication is to start off from one of the two base TMDCs’ monolayer and selectively substitute the top-most layer of chalcogen atoms with another kind. However, if the substitution is partial, the resulting material resembles more an alloy than a Janus-type structure. These in-between materials show their own interesting features, as they allow for example a fluid optical bad-gap tuning from that of MoSe₂ at 1.54 eV over 1.70 eV for MoSSe up to 1.84 eV of MoS₂. In my talk I want to show off the varying optical and electronic properties of these MoS_2(1−x)Se_2x (0 ≤ x ≤ 1) structures with a special focus on the Janus-type MoSSe monolayer. This talk will explore the fascinating question of what lies in between.