Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 16: Surface State Spectroscopy II
O 16.3: Vortrag
Montag, 7. März 2016, 15:30–15:45, H4
A XPS/XPD study of the topological insulator BiTe — •Philipp Espeter1, 2, Sven Döring2,3, Markus Eschbach3, Matthias Gehlmann2,3, Christoph Keutner1, 2, Christopher Kohlmann1, Dominique Krull1,2, Lukasz Plucinski3, Ulf Berges1,2, Claus M. Schneider3, and Carsten Westphal1,2 — 1Experimentelle Physik I, TU Dortmund, Otto-Hahn-Straße 4, D-44227 Dortmund, Germany — 2DELTA - Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, D-44227 Dortmund — 3Forschungszentrum Jülich, D-52425 Jülich
Three-dimensional topological insulators are considered being a new state of quantum matter. They show an electronic bulk band structure with an insulating gap while they also possess metallic and highly spin-polarized surface states. Since the most interesting effects occur at the surface of topological insulators, a precise knowledge of the surface morphology and structure is crucial to understand its electronic structure.
In this study, we demonstrate a surface structure investigation of the weak topological insulator Bi1Te1 by means of photoelectron spectroscopy (XPS) and photoelectron diffraction (XPD). These measurements provide chemical as well as structural information of the sample surface.
The XPD pattern reveal that twelve different surface terminations are present on top of the sample. Furthermore, we monitored slight scaling effects and a shifting of individual Bi and Te layers.