Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 46: 2D Materials beyond Graphene: TMDCs, Slicene and Relatives
O 46.11: Poster
Dienstag, 8. März 2016, 18:15–20:30, Poster E
Photoelectron Spectroscopy On Ferecrystalline Compounds — •Fabian Göhler1, Gavin Mitchson2, Matti Alemayehu2, Christian Raidel1, Florian Speck1, David C. Johnson2, and Thomas Seyller1 — 1Professur für Technische Physik, TU Chemnitz, Reichenhainer Str. 70, D-09126 Chemnitz, Germany — 2Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
Ever since the groundbreaking work on graphene by Novoselov and Geim, the preparation and properties of 2D materials have been of great interest to scientists. Going forward, the stacking of different sheet-like materials opens up new ways to design materials with specific properties. Recently, a new class of layered intergrowth materials built up from metal monochalcogenides and transition metal dichalcogenides has been prepared by the method of modulated elemental reactants (MER)[1]. These intergrowths have been termed ferecrystals[2], due to the turbostratic disorder occuring between the otherwise perfectly stacked layers.
Herein, we report the results of X-ray photoelectron spectroscopy studies carried out on (MSe)1(NbSe2)2 ferecrystals, where M = Pb, Sn or Bi. Core level and valence band spectra of ferecrystals are compared to the MER-produced binary compounds of MSe and NbSe2, respectively, to investigate inter-layer charge transfer in the ferecrystals.
[1] D. C. Johnson, Curr. Opin. Solid State Mater. Sci. 3, 159 (1998).
[2] M. Beekman et al, Semicond. Sci. Technol. 29, 064012 (2014).