Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 48: Poster: 2D Materials beyond Graphene: TMDCs, Silicene and Relatives
O 48.12: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
Growth and structure of mono- to few-layer vanadium disulphide on graphene on Ir(111) — •Joshua Hall1, Tobias Wekking1, Felix Huttmann1, Stefan Kraus1, Nico Rothenbach2, Katharina Ollefs2, Lucas M. Arruda3, Nick Brookes4, Gunnar Schönhoff5, Jan Berges5, Tim Wehling5, Wolfgang Kuch3, Heiko Wende2, and Thomas Michely1 — 1II. Physikalisches Institut, Universität zu Köln, Germany — 2Faculty of Physics and CENIDE, University of Duisburg-Essen, Duisburg, Germany — 3Institut für Experimentalphysik, Freie Universität Berlin, Germany — 4European Synchrotron Radiation Facility, ESRF, France — 5Institut für Theoretische Physik, Bremen Center for Computational Materials Science, Universität Bremen, Germany
Using scanning tunnelling microscopy and low-energy electron diffraction we study the growth and structure of vanadium disulphide VS2. The mono- to few-layer samples of VS2 on graphene on Ir(111) are grown by in situ molecular beam epitaxy. Depending on the specific growth parameters, a variety of growth scenarios evolves. Monolayer VS2 displays smoothly joined domains of a (3×1) superstructure that appears to result from an uniaxial distortion and buckling of the hexagonal VS2 lattice. In X-ray circular magnetic dichroism experiments, the ferromagnetism proposed in monolayer VS2 [1] is not found. In few-layer VS2, the hexagonal lattice is restored, still exhibiting multiple superstructures.
[1] Isaacs and Marianetti, PRB 94, 035120 (2016)