Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 15: Thermoelectric and Phase Change Materials
DS 15.3: Vortrag
Dienstag, 13. März 2018, 12:15–12:30, E 020
The Influence of Disorder on the Electrical Properties of SnTe-PbTe Alloys in the Vicinity of the Band Inversion — •Johannes Reindl1, Zheng Zeng1, Matteo Cagnoni1, Alexander Rochotzki1, Stefan Jakobs1, and Matthias Wuttig1,2 — 11. Physikalisches Institut (IA), RWTH Aachen University, 52056 Aachen, Germany — 2JARA-FIT, RWTH Aachen University, 52056 Aachen, Germany
Chalcogenide IV-VI compounds are well known to exhibit a plethora of intriguing physical properties, like symmetry protected topological surface states in SnTe or high thermoelectric performance in PbTe. Alloys of these two materials have been utilized for infrared applications because of the tunable small band gap. Furthermore, the combination of SnTe and PbTe yields the model system for the investigation of topological crystalline insulators.
So far research in general was focused on the study of samples with high quality to disentangle the underlying physical phenomena. However, having disorder and defects in the crystal, is not only more feasible or sometimes even beneficial for industrial application, but might also unveil new physical insight. Therefore, with a combination of conductivity, Hall and Seebeck measurements, we investigate the electrical properties of thin films with the stoichiometry being close to the band inversion.