SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 18: Poster: 2D Materials I
O 18.7: Poster
Monday, March 27, 2023, 18:00–20:00, P2/EG
Evolution of Band structure in 2D transition metal dichalcogenides alloy MoxW1−xSe2 — •Sarath Sasi1, Laurent Nicolaï1, Lucie Nedvědová1, Rostislav Medlín1, Michal Procházka1, Marie Netrvalová1, Sunil Wilfred Dsouza1, Christine Richter2,3, Karol Hricovini2,3, and Ján Minár1 — 1New Technologies Research Centre, University of West Bohemia, Pilsen, Czech Republic — 2LPMS, CY Cergy Paris Université, Neuville-sur-Oise, France — 3Université Paris-Saclay, CEA, CNRS, LIDYL, Gif-sur-Yvette, France
Among two-dimensional (2D) materials that emerged in the research scenario after the discovery of graphene, transition metal dichalcogenides (TMDCs) with the general formula MX2 (M=Mo, W; X=S, Se, Te) attract huge interest as a potential candidate for electronic and optoelectronic applications. There are many artificial methods to engineer the bandgap and spin-polarized bands, such as chemical doping, external electric field etc. Here we are studying the band structure of MoxW1−xSe2 single crystals alloy with various stoichiometric ratio x in comparison with WSe2. The structural characterisation of samples was analysed using Low energy electron diffraction, Raman Spectroscopy and Scanning Electron Microscopy with Energy Dispersive X-Ray Analysis, X-ray photoemission spectroscopy(XPS). Angle-Resolved Photoemission Spectroscopy (ARPES) was used to investigate the electronic band structure of the samples. We evaluated the band dispersion and observed the bands’ splitting at the K point. Thus we are evaluating a potential way for band engineering in TMDCs.