期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3117521
关键词
-
资金
- 973 Program of China [2006CB921805, 2005CB724400]
Based on first-principles calculation, we predict a tetragonal phase of BC2N (t-BC2N), which matches the experiment well because the estimated Vickers hardness and the simulated X-ray diffraction (XRD) and Raman patterns are in excellent agreement with the experimental results besides the low total energy and formation energy. In particular, we acquire the underlying physics behind the apparent lack of the transverse optical mode in the measured Raman spectrum and find the interesting electronic structure transition among the polymorph of superhard BC2N compounds. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3117521]
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