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Phase Change Materials - From Structures to Kinetics

  • Matthias Wuttig (a1), Wojciech Welnic (a2), Ralf Detemple (a3), Henning Dieker (a4), Johannes Kalb (a5), Daniel Wamwangi (a6) and Christoph Steimer (a7)...

Abstract

Phase change materials possess a unique combination of properties which include a pronounced property contrast between the amorphous and crystalline state, i.e. a high electrical and optical contrast. In particular the latter observation is indicative for a considerable structural difference between the amorphous and crystalline state. At the same time the crystallization of the amorphous state proceeds on a fast time scale. This raises the question how structure, properties and kinetics are related in phase change alloys. It will be demonstrated that only a small group of covalent semiconductors with octahedral-like coordination has the required property combination. This is related to their thermodynamic properties which govern the kinetics of crystallization.

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Keywords

Phase Change Materials - From Structures to Kinetics

  • Matthias Wuttig (a1), Wojciech Welnic (a2), Ralf Detemple (a3), Henning Dieker (a4), Johannes Kalb (a5), Daniel Wamwangi (a6) and Christoph Steimer (a7)...

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