Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Postersession I
DS 36.6: Poster
Mittwoch, 22. März 2017, 17:00–19:00, P2-EG
Proof of the existence of Sn3O4 through Raman spectroscopy: a combined theoretical and experimental study — •Christian Heiliger1, Bianca Eifert1, Marcel Giar1, Martin Becker2, Christian T. Reindl2, Lilan Zheng3, Angelika Polity2, Yunbin He3, and Peter J. Klar2 — 1Institute of Theoretical Physics, Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany — 2I. Institute of Physics, Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany — 3Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China
The existence of an intermediate phase within the tin oxide system was first reported in 1882. However, its stoichiometry and its crystal structure have been dubious and heavily debated ever since, despite a multitude of structural investigations. Here we show that a combined Raman spectroscopic investigation based on ab initio methods and experiments offers an alternative to diffraction studies, which are not conclusive for this material system. It allows us to unambigiuously identify the intermediate phase as Sn3O4 and to rule out the other likely candidate, Sn2O3. We assign the one-phonon Raman signals of Sn3O4 to the mode symmetries of the corresponding point group C2h and confirm the space group as P21/c with 14 atoms per unit cell.