Regensburg 2022 – scientific programme
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DS: Fachverband Dünne Schichten
DS 20: Poster
DS 20.29: Poster
Wednesday, September 7, 2022, 16:00–18:00, P3
Electronic Structure of [(SnSe)1+δ]m(TiSe2)n investigated by Photoelectron Spectroscopy — •Niels Rösch1, Fabian Göhler1, Danielle M. Hamann2, David C. Johnson2, and Thomas Seyller1 — 1Technische Universität Chemnitz, Institut für Physik, 09126 Chemnitz — 2University of Oregon, Department of Chemistry, Eugene OR 97401
The Modulated Elemental Reactants (MER) synthesis is a new method for producing multilayer heterostructures. A precursor is created in MER by using consecutive physical vapour deposition. The precursor’s structure and composition can be deliberately changed to mimic the desired heterostructure. After that, the precursor is crystallized by annealing it at low temperatures in an inert environment. Low temperatures allow thermodynamically metastable films to form, albeit at the cost of turbostratic rotational disorder between layers. By systematically modifying the stacking sequence of individual layers, this approach can be used to create a succession of layered heterostructures.
X-ray photoelectron spectroscopy was used to investigate the electrical structure of a sequence of [(SnSe)1+δ]m(TiSe2)n heterostructures [1]. It is demonstrated that electrons are transferred from the SnSe layers to the TiSe2 layers. Understanding charge transfer in heterostructures is important for future applications, as controlled stacking of the heterostructure may allow for targeted doping.
[1] Göhler, F., Hamann, D. M., Rösch, N., et al., J. Mater. Res. 34 (12): (2019)