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DS: Fachverband Dünne Schichten
DS 12: Postersession DS
DS 12.51: Poster
Monday, March 7, 2016, 17:00–19:00, Poster A
Designing new Phase Change Materials via Stoichiometry — •Stefan Jakobs1, Alexander von Hoegen1, and Matthias Wuttig1,2 — 1I. Physikalisches Institut (IA), RWTH Aachen University, 52056 Aachen, Germany — 2JARA - Fundamentals of Future Information Technology, RWTH Aachen University, Germany
Phase change media utilize a remarkable property portfolio including the ability to rapidly switch between the amorphous and crystalline state, which differ significantly in their properties. This material combination makes them very attractive for data storage application in rewriteable optical data storage, where the pronounced difference of optical properties between the amorphous and crystalline state is used
[1] . This unconventional class of materials is also the basis of a storage concept to replace flash memory. This poster will discuss the unique material properties, which characterize phase change materials. In particular, it will be shown that only a rather small group of materials utilizes resonant bonding, a particular flavour of covalent bonding, which can explain many of the characteristic features of phase change materials. This insight is employed to predict systematic property trends and to explore the limits in stoichiometry for such memory applications. It will be demonstrated how this concept can be used to tailor the electrical and thermal conductivity of phase change materials.
[1] Wuttig, M. and Yamanda, N. Nature materials 6(11), 824-832 (2007)