论文类型：期刊论文
第一作者：徐萌
通讯作者：徐明
合写作者：缪向水,程晓敏,徐开朗,童浩,李博文
发表刊物：Physical Chemistry Chemical Physics
所属单位：华中科技大学
学科门类：工学
一级学科：电子科学与技术
文献类型：J
卷号：21
期号：8
页面范围：4494-4500
DOI码：10.1039/C8CP07446A
发表时间：4349-04-01
摘要：The thermal stability of the amorphous phase is a key property of phase-change memory, which limits the data retention time and device reliability. The high thermal stability of memory devices enables their applications in harsh environments and under extreme conditions. Here, we discovered that the alloying of C, Si and Ge significantly improves the stability of amorphous Sb by adding “alien” tetrahedral seeds to the octahedral matrix. This doping strategy impedes the crystallization at elevated temperatures so that the crystallization temperature of Sb is increased by 170–220 °C. The mechanism is systematically investigated by ab initio molecular dynamics simulations and classical crystal growth theory. We confirm that the alien tetrahedral bonds increase the activation energy of atomic migration upon crystallization. Our results demonstrate an effective alloying strategy to improve the thermal stability of phase change memory, paving the way for the design of durable memory devices.
发布期刊链接：https://www.researchgate.net/publication/330719267_Stabilizing_the_amorphous_Sb_by_adding_alien_seeds_for_durable_memory_materials