The Switching Cycle of Phase-Change Materials: Time-Resolved Diffraction after Laser Excitation
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)(2023)
摘要
Phase-Change Materials (PCMs) are used as active switching elements in novel electronic memory devices. The writing mechanism of this memory is based on atomic kinetics that offer (i) sub-nanosecond, fast crystallization over a wide range of elevated temperatures and (ii) stable glass formation at ambient conditions. It was shown previously that these regimes are characterized by a low and high activation energy of atomic diffusivity, respectively. The transition between these regimes has been associated with a fragile-to-strong crossover[1] and/or with a glass transition[2], but its microscopic origin has remained elusive - mostly due to the experimental limitations imposed by the fast crystallization of this disordered state.
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关键词
active switching elements,atomic diffusivity,atomic kinetics,elevated temperatures,fast crystallization,glass transition,high activation energy,laser excitation,low activation energy,novel electronic memory devices,phase-Change Materials,Phase-Change Materials,stable glass formation,switching cycle,time-resolved diffraction,writing mechanism
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