中国物理B ›› 2016, Vol. 25 ›› Issue (1): 16103-016103.doi: 10.1088/1674-1056/25/1/016103

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

A new family of sp3-hybridized carbon phases

Ning Xu(徐宁), Jian-Fu Li(李建福), Bo-Long Huang(黄勃龙), 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
  • 收稿日期:2015-04-24 修回日期:2015-09-06 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: Ning Xu E-mail:nxu@ycit.cn
  • 基金资助:
    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).

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. 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
  • Received:2015-04-24 Revised:2015-09-06 Online:2016-01-05 Published:2016-01-05
  • Contact: Ning Xu E-mail:nxu@ycit.cn
  • Supported by:
    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).

摘要: 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.

关键词: low-temperature phase transformation, superhard carbon phase

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.

Key words: low-temperature phase transformation, superhard carbon phase

中图分类号:  (Elemental solids)

  • 61.66.Bi
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)