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	Decompression-Induced Diamond Formation from Graphite Sheared under Pressure
	Dong, JJ; Yao, Z; Yao, MG; Li, R; Hu, K; Zhu, LY; Wang, Y; Sun, HH; Sundqvist, B; Yang, K
刊名	PHYSICAL REVIEW LETTERS
	2020
卷号	124期号:6页码:-
关键词	TOTAL-ENERGY CALCULATIONS X-RAY GLASSY-CARBON TRANSFORMATION TRANSITION MECHANISM GRAPHENE GROWTH
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.124.065701
文献子类	期刊论文
英文摘要	Graphite is known to transform into diamond under dynamic compression or under combined high pressure and high temperature, either by a concerted mechanism or by a nucleation mechanism. However, these mechanisms fail to explain the recently reported discovery of diamond formation during ambient temperature compression combined with shear stress. Here we report a new transition pathway for graphite to diamond under compression combined with shear, based on results from both theoretical simulations and advanced experiments. In contrast to the known model for thermally activated diamond formation under pressure, the shear-induced diamond formation takes place during the decompression process via structural transitions. At a high pressure with large shear, graphite transforms into ultrastrong sp(3) phases whose structures depend on the degree of shear stress. These metastable sp(3) phases transform into either diamond or graphite upon decompression. Our results explain several recent experimental observations of low-temperature diamond formation. They also emphasize the importance of shear stress for diamond formation, providing new insight into the graphite-diamond transformation mechanism.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32777]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Umea Univ, Dept Phys, SE-90187 Umea, Sweden 2.Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China 3.Changchun Univ Sci & Technol, Inst Mat Sci & Engn, Changchun 130022, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Dong, JJ,Yao, Z,Yao, MG,et al. Decompression-Induced Diamond Formation from Graphite Sheared under Pressure[J]. PHYSICAL REVIEW LETTERS,2020,124(6):-.
APA	Dong, JJ.,Yao, Z.,Yao, MG.,Li, R.,Hu, K.,...&Liu, BB.(2020).Decompression-Induced Diamond Formation from Graphite Sheared under Pressure.PHYSICAL REVIEW LETTERS,124(6),-.
MLA	Dong, JJ,et al."Decompression-Induced Diamond Formation from Graphite Sheared under Pressure".PHYSICAL REVIEW LETTERS 124.6(2020):-.

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