CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
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; Liu, BB
2020
Source PublicationPHYSICAL REVIEW LETTERS
ISSN0031-9007
Volume124Issue:6Pages:-
Subtype期刊论文
AbstractGraphite 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.
KeywordTOTAL-ENERGY CALCULATIONS X-RAY GLASSY-CARBON TRANSFORMATION TRANSITION MECHANISM GRAPHENE GROWTH
DOI10.1103/PhysRevLett.124.065701
Indexed BySCI
Language英语
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32777
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
2.Changchun Univ Sci & Technol, Inst Mat Sci & Engn, Changchun 130022, Peoples R China
3.Umea Univ, Dept Phys, SE-90187 Umea, Sweden
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
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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