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Chin. Phys. B, 2016, Vol. 25(1): 016103    DOI: 10.1088/1674-1056/25/1/016103

A new family of sp3-hybridized carbon phases

Ning Xu(徐宁)1, Jian-Fu Li(李建福)2, Bo-Long Huang(黄勃龙)2, Bao-Lin Wang(王保林)1
1. Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China;
2. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
Abstract  A new family of superhard carbon allotropes C48(2i+1) is constructed by alternating even 4 and 8 membered rings. These new carbon allotropes are of a spatially antisymmetrical structure, compared with the symmetrical structures of bct-C4, Z-carbon, and P-carbon. Our calculations show that bulk moduli of C48(2i+1) are larger than that of c-BN and smaller than that of cubic-diamond. C48(2i+1) are transparent superhard materials possessing large Vicker hardness comparable to diamond. This work can help us understand the structural phase transformations of cold-compression graphite and carbon nanotubes.
Keywords:  low-temperature phase transformation      superhard carbon phase  
Received:  24 April 2015      Revised:  06 September 2015      Published:  05 January 2016
PACS:  61.66.Bi (Elemental solids)  
  61.50.Ks (Crystallographic aspects of phase transformations; pressure effects)  
  62.50.-p (High-pressure effects in solids and liquids)  
  78.30.Am (Elemental semiconductors and insulators)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174242, 11204265, 11404278, 11147007, and 11274151), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2012248), and the Scientific Research Foundation of Yancheng Institute of Technology, China (Grant No. KJC2014024).
Corresponding Authors:  Ning Xu     E-mail:

Cite this article: 

Ning Xu(徐宁), Jian-Fu Li(李建福), Bo-Long Huang(黄勃龙), Bao-Lin Wang(王保林) A new family of sp3-hybridized carbon phases 2016 Chin. Phys. B 25 016103

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