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O: Fachverband Oberflächenphysik

O 48: Poster Session - Electronic Structure of Surfaces: Spectroscopy, Surface States

O 48.11: Poster

Dienstag, 17. März 2020, 18:15–20:00, P2/EG

Angle-resolved photoemission spectroscopy measurements from thin film manganites — •Jonas Pöhls, Marten Düvel, Cinja Seick, Vitaly Bruchmann-Bamberg, Jan Philipp Bange, Marco Merboldt, Henrike Probst, Marius Keunecke, Sabine Steil, Daniel Steil, and Stefan Mathias — 1st Physical Institute, University of Göttingen

Strongly correlated oxide perovskites, e.g. the manganite La_1−xSr_xMnO₃ (LSMO), have a very rich magnetic phase diagram [1]. This is closely linked with the electronic structure of the material. Angle-resolved photoemission spectroscopy (ARPES) provides an opportunity to study this structure. Due to the surface sensitivity of this technique, the study of thin films produced by metalorganic aerosol deposition (MAD) in atmosphere is challenging. We have developed a two-step cleaning process to prepare the samples in UHV for the ARPES studies. For this purpose we simulate in a first step the conditions during the production in the MAD for cleaning. In the second step we use a reaction with ozone to remove the remaining adsorbates. We will present our setup and discuss the influence of our cleaning process on the material properties. Furthermore, first photoemission data on the band structure of MAD-grown manganites will be presented.
[1] Moshnyaga et al., Ann. Phys. 523, 652 (2011)