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题名:
Reversible devitrification in amorphous As2Se3 under pressure
作者: Ahmad, AS; Lou, HB; Lin, CL; Li, AG; Yang, K; Glazyrin, K; Liermann, HP; Franz, H; Stahl, K; Cui, S; Bureau, B; Zhang, DX; Wang, XD; Cao, QP; Greer, AL; Jiang, JZ
刊名: PHYSICAL REVIEW B
出版日期: 2016
卷号: 94, 期号:19, 页码:-
DOI: 10.1103/PhysRevB.94.195211
通讯作者: Jiang, JZ (reprint author), Zhejiang Univ, Sch Mat Sci & Engn, Int Ctr New Struct Mat, Hangzhou 310027, Peoples R China. ; Jiang, JZ (reprint author), Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Lab New Struct Mat, Hangzhou 310027, Peoples R China.
文章类型: 期刊论文
英文摘要: In pressure-induced reversible structural transitions, the term "reversible" refers to the recovery of the virgin structure in a material upon complete decompression. Pressure-induced amorphous-to-crystalline transitions have been claimed to be reversible, but evidence that amorphous material recovers its virgin amorphous structure upon complete depressurization has been lacking. In amorphous As2Se3 (a-As2Se3) chalcogenide, however, we report a novel reversible amorphous-to-crystalline transition that provides compelling experimental evidence that upon complete decompression, the recovered amorphous phase is structurally the same as that of the virgin (as-cast) amorphous phase. Combining the experimental results with ab initio molecular dynamics simulations, we elucidate that the amorphization ismediated by a surplus of total free energy in the high-pressure face-centered cubic phase as compared to the virgin amorphous phase and that the structural recovery to the virgin amorphous phase is a consequence of an enhancement in covalent bonding character over interlayer forces upon complete decompression. Furthermore, we observed a two-dimensional to three-dimensional network transition under compression and its reversibility upon decompression.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000388818000012
ISSN号: 2469-9950
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26615
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Ahmad, AS,Lou, HB,Lin, CL,et al. Reversible devitrification in amorphous As2Se3 under pressure[J]. PHYSICAL REVIEW B,2016-01-01,94(19):-.
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