SKM 2023 – scientific programme

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DS: Fachverband Dünne Schichten

DS 12: Poster

DS 12.38: Poster

Wednesday, March 29, 2023, 17:00–19:00, P3

IST 312 - an unconventional phase change material? — •Maria Häser, Peter Kerres, Sophia Wahl, Carl-Friedrich Schön, and Matthias Wuttig — I. Physikalisches Institut (IA), RWTH Aachen University, 52056 Aachen Germany

Chalcogenide-based Phase Change Materials (PCM) are a prominent candidate for energy-efficient memory devices. This material class shows a significant difference in its optical properties between the amorphous and crystalline phases: The former phase shows more insulating characteristics. In contrast, the almost metallic properties characterise the crystalline state. However, enabling fast switching between insulators and a real metal would broaden the field of application of PCMs.

In this study, the unusual phase change material In₃SbTe₂ (IST) has been investigated, which shows a metallic-like behaviour in its crystalline phase. The dielectric functions of both phases were determined using optical measurements (FTIR, Ellipsometry). Additionally, DFT calculations and XRD measurements were performed to better understand the unusual property change.