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- W2619562665 abstract "Crystallization of solid is generally slow in kinetics for atoms trapped in solids. Phase-change materials (PCMs) challenge current theory on its ultrafast reversible amorphous-to-crystal transition. Here by using the stochastic surface walking global optimization method, we establish the first global potential energy surface (PES) for Ge2Sb2Te5. By analyzing all structures on the global PES, we show that an inherent structural pattern of simple cubic lattice is present universally in low-energy structures, either globally in a newly found metastable simple cubic crystal phase or locally in the amorphous structures. Our solid-to-solid reaction pathway sampling reveals that this simple cubic lattice plays a critical role in the rapid amorphous-to-crystal transition, which occurs via dynamic vacancy creation/annihilation, Martensitic-type {100} shearing, and diffusionless local relaxation. This knowledge from global PES allows the prediction of PCMs by linking the phase-change kinetics with the geometry of metastable phases." @default.
- W2619562665 created "2017-06-05" @default.
- W2619562665 creator A5006544967 @default.
- W2619562665 creator A5023502514 @default.
- W2619562665 creator A5044756293 @default.
- W2619562665 date "2017-05-25" @default.
- W2619562665 modified "2023-09-22" @default.
- W2619562665 title "Inherent Simple Cubic Lattice Being Responsible for Ultrafast Solid-Phase Change of Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>" @default.
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- W2619562665 doi "https://doi.org/10.1021/acs.jpclett.7b00913" @default.
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