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  • 刘新 ( 副教授 )

    的个人主页 http://faculty.dlut.edu.cn/xliu/en/index.htm

  •   副教授   博士生导师   硕士生导师
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Role of Electronic Excitation in the Amorphization of Ge-Sb-Te Alloys

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论文类型:期刊论文
发表时间:2011-06-29
发表刊物:PHYSICAL REVIEW LETTERS
收录刊物:Scopus、SCIE、EI
卷号:107
期号:1
ISSN号:0031-9007
摘要:First-principles molecular dynamics simulation reveals the effects of electronic excitation in the amorphization of Ge-Sb-Te. The excitation makes the phase change an element-selective process, lowers the critical amorphization temperature considerably, for example, to below 700 K at a 9% excitation, and reduces the atomic diffusion coefficient with respect to that of melt by at least 1 order of magnitude. Noticeably, the resulting structure has fewer wrong bonds and significantly increased phase-change reversibility. Our results point to a new direction in manipulating ultrafast phase-change processes with improved controllability.

 

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