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- W2404769078 abstract "Abstract Insights into the local atomic arrangements of layered Ge-Sb-Te compounds are of particular importance from a fundamental point of view and for data storage applications. In this view, a detailed knowledge of the atomic structure in such alloys is central to understanding the functional properties both in the more commonly utilized amorphous–crystalline transition and in recently proposed interfacial phase change memory based on the transition between two crystalline structures. Aberration-corrected scanning transmission electron microscopy allows direct imaging of local arrangement in the crystalline lattice with atomic resolution. However, due to the non-trivial influence of thermal diffuse scattering on the high-angle scattering signal, a detailed examination of the image contrast requires comparison with theoretical image simulations. This work reveals the local atomic structure of trigonal Ge-Sb-Te thin films by using a combination of direct imaging of the atomic columns and theoretical image simulation approaches. The results show that the thin films are prone to the formation of stacking disorder with individual building blocks of the Ge 2 Sb 2 Te 5 , Ge 1 Sb 2 Te 4 and Ge 3 Sb 2 Te 6 crystal structures intercalated within randomly oriented grains. The comparison with image simulations based on various theoretical models reveals intermixed cation layers with pronounced local lattice distortions, exceeding those reported in literature." @default.
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- W2404769078 date "2016-05-25" @default.
- W2404769078 modified "2023-09-27" @default.
- W2404769078 title "Local atomic arrangements and lattice distortions in layered Ge-Sb-Te crystal structures" @default.
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- W2404769078 doi "https://doi.org/10.1038/srep26724" @default.
- W2404769078 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4879703" @default.
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