Nano and Ultra-fast Phase Change

At the nano-scale, phase change behavior is different from that of bulk. In this paper 2 dimensional nano-phase change effect of GeSbTe was investigated theoretically and experimentally in terms of different film thickness and different material composition. The measured properties in this work include size dependent electrical resistance versus temperature/heating rate and melting point. Results reveal that material properties of GeSbTe are highly size dependent. The correlation between phase change speed and size is also discussed.