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Title: Computational prediction of body-centered cubic carbon in an all- s p 3 six-member ring configuration

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Renmin Univ. of China, Beijing (China)
  3. Univ. of Nevada, Las Vegas, NV (United States)

Recent shock compression experiments produced clear evidence of a new carbon phase, but a full structural identification has remained elusive. Here we establish by ab initio calculations a body-centered cubic carbon phase in Ia3¯d(O10h) symmetry, which contains twelve atoms in its primitive cell, thus termed BC12, and comprises all-sp3 six-membered rings. This structural configuration places BC12 carbon in the same bonding type as cubic diamond, and its stability is verified by phonon mode analysis. Simulated x-ray diffraction patterns provide an excellent match to the previously unexplained distinct diffraction peak found in shock compression experiments. Electronic band and density of states calculations reveal that BC12 is a semiconductor with a direct band gap of ~2.97eV. Lastly, these results provide a solid foundation for further exploration of this new carbon allotrope.

Research Organization:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001982
OSTI ID:
1332443
Alternate ID(s):
OSTI ID: 1184431
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 21; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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Cited By (6)

Elastic Properties of Fullerites and Diamond-Like Phases journal December 2018
CI 24-Si: a Semiconducting Silicon Phase with an All-sp 3 Bonding Network journal January 2018
New carbon allotropes in sp + sp 3 bonding networks consisting of C 8 cubes journal January 2018
fvs-Si48: a direct bandgap silicon allotrope journal January 2018
Stochastic generation of complex crystal structures combining group and graph theory with application to carbon journal January 2018
Stochastic generation of complex crystal structures combining group and graph theory with application to carbon text January 2018

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