From Continuous to First-Order-Like: Amorphous-to-Amorphous Transition in Phase-Change Materials
From Continuous to First-Order-Like: Amorphous-to-Amorphous Transition in Phase-Change Materials
Polymorphism is ubiquitous in crystalline solids. Amorphous solids, such as glassy water and silicon, may undergo amorphous-to-amorphous transitions (AATs). The nature of AATs remains ambiguous, due to diverse system-dependent behaviors and experimental challenges to characterize disordered structures. Here, we identify two ordered motifs in amorphous phase-change materials and monitor their interplay upon pressure-induced AATs. Tuning temperature, we find a crossover from continuous to first-order-like AATs. The crossover emerges at a special pressure-temperature combination, where the AAT encounters a maximum in crystallization rate. Analyzing the two ordered motifs in a two-state model, we draw a phenomenological parallel to the phase transition behavior of supercooled water near its second critical point. This analogy raises an intriguing question regarding the existence of a critical-like point within amorphous solids.
Yoshio Kono、Yuhan Chen、Jens Moesgaard、Seiya Takahashi、Arune Makareviciute、Shuai Wei、Sho Kakizawa、Davide Campi、Marco Bernasconi、Koji Ohara、Ichiro Inoue、Yujiro Hayashi、Makina Yabashi、Eiji Nishibori、Riccardo Mazzarello、Tomoki Fujita
物理学
Yoshio Kono,Yuhan Chen,Jens Moesgaard,Seiya Takahashi,Arune Makareviciute,Shuai Wei,Sho Kakizawa,Davide Campi,Marco Bernasconi,Koji Ohara,Ichiro Inoue,Yujiro Hayashi,Makina Yabashi,Eiji Nishibori,Riccardo Mazzarello,Tomoki Fujita.From Continuous to First-Order-Like: Amorphous-to-Amorphous Transition in Phase-Change Materials[EB/OL].(2025-04-09)[2025-05-14].https://arxiv.org/abs/2504.07154.点此复制
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