Study of vacancy ordering and the boson peak in metastable cubic Ge-Sb-Te using machine learning potentials

Young-Jae Choi, Minjae Ghim, Seung-Hoon Jhi

The mechanism of the vacancy ordering in metastable cubic Ge-Sb-Te (c-GST) that underlies the ultrafast phase-change dynamics and prominent thermoelectric properties remains elusiv…