Tuning the Crystallization Mechanism by Composition Vacancy in Phase Change Materials
Wen-Xiong Song,
Qiongyan Tang,
Jin Zhao
et al.
Abstract:Interface-influenced crystallization is crucial to understanding the nucleation-and growth-dominated crystallization mechanisms in phase-change materials (PCMs), but little is known. Here, we find that composition vacancy can reduce the interface energy by decreasing the coordinate number (CN) at the interface. Compared to growth-dominated GeTe, nucleation-dominated Ge 2 Sb 2 Te 5 (GST) exhibits composition vacancies in the (111) interface to saturate or stabilize the Teterminated plane. Together, the experime… Show more
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