Peter Zalden, Florian Quirin, Mathias Schumacher, Jan Siegel, Shuai Wei, Azize Koc, Matthieu Nicoul, Mariano Trigo, Pererik Andreasson, Henrik Enquist, Michael J. Shu, Tommaso Pardini, Matthieu Chollet, Diling Zhu, Henrik Lemke, Ider Ronneberger, Jörgen Larsson, Aaron M. Lindenberg, Henry E. Fischer, Stefan Hau-Riege, David A. Reis, Riccardo Mazzarello, Matthias Wuttig, Klaus Sokolowski-Tinten
- In phase-change memory devices, a material is cycled between glassy and crystalline states. The highly temperature-dependent kinetics of its crystallization process enables application in memory technology, but the transition has not been resolved on an atomic scale. Using femtosecond x-ray diffraction and ab initio computer simulations, we determined the time-dependent pair-correlation function of phase-change materials throughout the melt-quenching and crystallization process. We found a liquid-liquid phase transition in the phase-change materials Ag4In3Sb67Te26 and Ge15Sb85 at 660 and 610 kelvin, respectively. The transition is predominantly caused by the onset of Peierls distortions, the amplitude of which correlates with an increase of the apparent activation energy of diffusivity. This reveals a relationship between atomic structure and kinetics, enabling a systematic optimization of the memory-switching kinetics.
MetadatenAuthor details: | Peter ZaldenORCiD, Florian Quirin, Mathias Schumacher, Jan SiegelORCiD, Shuai WeiORCiD, Azize KocGND, Matthieu NicoulORCiD, Mariano Trigo, Pererik AndreassonORCiD, Henrik Enquist, Michael J. Shu, Tommaso Pardini, Matthieu CholletORCiD, Diling Zhu, Henrik Lemke, Ider RonnebergerORCiD, Jörgen LarssonORCiD, Aaron M. LindenbergORCiD, Henry E. Fischer, Stefan Hau-RiegeORCiD, David A. ReisORCiD, Riccardo MazzarelloORCiD, Matthias WuttigORCiD, Klaus Sokolowski-TintenORCiD |
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DOI: | https://doi.org/10.1126/science.aaw1773 |
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ISSN: | 0036-8075 |
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ISSN: | 1095-9203 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31197008 |
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Title of parent work (English): | Science |
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Publisher: | American Assoc. for the Advancement of Science |
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Place of publishing: | Washington, DC |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/06/14 |
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Publication year: | 2019 |
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Release date: | 2021/01/21 |
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Volume: | 364 |
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Issue: | 6445 |
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Number of pages: | 39 |
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First page: | 1062 |
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Last Page: | 1067 |
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Funding institution: | German Research Council through the Collaborative Research Center [SFB 1242, 278162697, So408/9-1, SFB 917, Ma-5339/2-1]; European UnionEuropean Union (EU) [280555]; JARA-HPC from RWTH Aachen University [JARA0150, JARA0183]; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, through the Division of Materials Sciences and EngineeringUnited States Department of Energy (DOE) [DE-AC02-76SF00515]; U.S. Department of Energy by Lawrence Livermore National LaboratoryUnited States Department of Energy (DOE) [DE-AC52-07NA27344]; Swedish Research CouncilSwedish Research Council; Spanish Ministry of Science, Innovation and Universities through research grant UDiSON [TEC2017-82464-R]; Humboldt FoundationAlexander von Humboldt Foundation |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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Peer review: | Referiert |
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Publishing method: | Open Access / Green Open-Access |
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