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O: Fachverband Oberflächenphysik
O 47: Poster Session - 2D Materials: Electronic Structure, Excitations, etc.
O 47.10: Poster
Dienstag, 17. März 2020, 18:15–20:00, P2/EG
Local electronic properties of monolayer and bilayer VS2 on Au(111) — •Jannik Dornseiff, Sabina Simon, Felix Förschner, Julia Tesch, and Mikhail Fonin — Department of Physics, University of Konstanz, 78457 Konstanz, Germany
The recent discovery of ferromagnetism in VSe2 [1] boosted the interest in two-dimensional transition metal dichalcogenides (TMDs), which show peculiar magnetic properties. In this work we discuss the structure and local electronic properties of VS2 monolayer on Au(111). By means of low-temperature scanning tunneling microscopy we analyze the exact atomic arrangement of VS2. In spectroscopic measurements we observe a dominant peak at EF, whose shape and position are dependent on the spatial position within the Moiré unit cell. Bilayer VS2 islands show the same atomic structure as the monolayer. However, the electronic structure is distinctly different showing a gapped behaviour around EF. We discuss our findings in conjunction with electron correlation effects in VS2.
[1]. M. Bonilla et al., Nature Nanotechnology 13, 289 (2018).