期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 82, 期 -, 页码 540-543出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2013.10.032
关键词
New carbon; Deformation; Stability; First-principles
资金
- Newton International Fellowship [NF080039]
- Newton Alumni Follow-On of UK's Royal Society
- NSFCs [11372131, 11232007, 10602023]
- Aeronautical Science Foundation [2012ZF52074]
- 973 Program [2011CB707602]
- Fundamental Research Funds for the Central Universities
- PAPD of China
- Royal Society [NF080039] Funding Source: Royal Society
First-principles density-functional investigations on H6-carbon of all sp(2)-bonds are presented, which show that H6-carbon is stable under isotropic deformations and tetragonal deformations of volume-conserving. However, H6-carbon cannot withstand trigonal deformations and may undergo phase transitions under triaxial shear, although it presents a bulk modulus of 273 GPa as a hard material. H6-carbon also exhibits metastability against diamond as the difference of cohesive energy is 0.80 eV. Small electronic energy gap of band structure indicates that H6-carbon is metallic. (C) 2013 Elsevier B.V. All rights reserved.
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