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Evolution of short- and medium-range order in the melt-quenching amorphization of Ge2Sb2Te5

TitleEvolution of short- and medium-range order in the melt-quenching amorphization of Ge2Sb2Te5
Publication TypeJournal Article
Year of Publication2018
AuthorsQiao, C, Guo, YR, Dong, F, Wang, JJ, Shen, H, Wang, SY, Xu, M, Miao, XS, Zheng, YX, Zhang, RJ, Chen, LY, Wang, CZ, Ho, KM
JournalJournal of Materials Chemistry C
Volume6
Pagination5001-5011
Date Published05
Type of ArticleArticle
ISBN Number2050-7526
Accession NumberWOS:000433515700023
Keywordsalloys, augmented-wave, change memory, induced crystallization, initio molecular-dynamics, Materials Science, metals, method, origin, phase-change materials, physics, semiconductors, technology
Abstract

ctures during the amorphization process. Interestingly, tetrahedrons show aggregation in liquid and supercooled liquid in contrast to 6-fold octahedrons which present notable aggregation in amorphous GST. Moreover, our study showed that wrong bonds (Ge-Ge, Sb-Sb, Ge-Sb and Te-Te bonds) can promote the formation of large rings, and irreducible rings tend to separate into smaller and larger rings as the temperature is decreased. Our findings provide useful insights into the formation process and the structure of amorphous GST, which is valuable for facilitating the application of phase change materials.

DOI10.1039/c8tc00549d
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Exploratory Theory

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Structures and Dynamics