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Abstract

bct-C4 carbon allotrope has been attracted great interest because its excellent mechanical properties. In this paper, we study the elastic properties and the strength properties of bct-C4 carbon by first-principles method. Our results show that bct-C4 presents a super uniaxial compressive strength of 524.3GPa, which is 6.9% more than the corresponding value of diamond. The high compressive strength originates from the high compressive rate of chemical bond deviating from compressive direction. Our work suggests that bct -C4 carbon can be widely used in the area of high pressure research.

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Funds:Project supported by the National Natural Science Foudation of China (Grant No. 10972066).

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Vol. 61, Issue 9 - 2012-05-05

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