Berlin 2018 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.53: Poster

Dienstag, 13. März 2018, 18:15–20:15, Poster B

Structural Characterisation of Crystalline Lead-Antimony-Telluride Alloys — •Alexander Rochotzki¹, Johannes Reindl¹, and Matthias Wuttig^1,2 — ¹I. Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany — ²JARA - FIT, RWTH Aachen University, 52056 Aachen, Germany

The material class of chalcogenides has great potential for practical applications, ranging from optical and electrical data storage to thermoelectrics. For the latter, materials on the tie line between PbTe and Sb₂Te₃ are interesting candidates. In the past, the group of Shelimova et al. has already investigated such compounds in their thermodynamic stable hexagonal phase with respect to structure and possible thermoelectric applications [1].
In the hexagonal phase of (PbTe)_x(Sb₂Te₃)_1−x, the intrinsic vacancies form layers, similar to the isoelectronic phase-change materials on the tie line between GeTe and Sb₂Te₃, which additionally exhibit a metastable cubic phase, not yet seen in (PbTe)_x(Sb₂Te₃)_1−x. In this work we aim to synthesise the metastable cubic phase of PbSbTe while characterising and optimising the structural properties of the compounds fabricated.
[1] Shelimova, L.E. et al., Inorganic Materials, Vol. 40, 1440 (2004)