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      Atomic electron tomography: 3D structures without crystals

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      Science
      American Association for the Advancement of Science (AAAS)

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          Phase-change materials for rewriteable data storage.

          Phase-change materials are some of the most promising materials for data-storage applications. They are already used in rewriteable optical data storage and offer great potential as an emerging non-volatile electronic memory. This review looks at the unique property combination that characterizes phase-change materials. The crystalline state often shows an octahedral-like atomic arrangement, frequently accompanied by pronounced lattice distortions and huge vacancy concentrations. This can be attributed to the chemical bonding in phase-change alloys, which is promoted by p-orbitals. From this insight, phase-change alloys with desired properties can be designed. This is demonstrated for the optical properties of phase-change alloys, in particular the contrast between the amorphous and crystalline states. The origin of the fast crystallization kinetics is also discussed.
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            THE ATOMIC ARRANGEMENT IN GLASS

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              Algebraic reconstruction techniques (ART) for three-dimensional electron microscopy and x-ray photography.

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                Author and article information

                Journal
                Science
                Science
                American Association for the Advancement of Science (AAAS)
                0036-8075
                1095-9203
                September 22 2016
                September 22 2016
                : 353
                : 6306
                : aaf2157
                Article
                10.1126/science.aaf2157
                27708010
                0ff5927b-f1fc-4db7-bb02-b98eb02f6e92
                © 2016

                http://www.sciencemag.org/about/science-licenses-journal-article-reuse

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