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arXiv 1202.6030cond-mat.mtrl-sciphysics.comp-ph
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一种新型单斜碳同素异形体的预测

Prediction of a novel monoclinic carbon allotrope

Maximilian Amsler, José A. Flores-Livas, Silvana Botti, Miguel A. L. Marques, Stefan Goedecker

摘要:

在\emph{ab-initio}的最小跳跃结构搜索过程中发现了一种新的具有$P2/m$对称性的碳的同素异形体,我们称之为$M10$ -碳。这种结构被预测在高于14.4 GPa的压力下比石墨更稳定,并且纯粹由$sp^3$键组成。它具有很高的体积模量,几乎和金刚石一样硬。模拟的X射线衍射图的比较表明,从冷压缩石墨的实验结果有很好的协议。

英文摘要:

A novel allotrope of carbon with $P2/m$ symmetry was identified during an \emph{ab-initio} minima-hopping structural search which we call $M10$-carbon. This structure is predicted to be more stable than graphite at pressures above 14.4 GPa and consists purely of $sp^3$ bonds. It has a high bulk modulus and is almost as hard as diamond. A comparison of the simulated X-ray diffraction pattern shows a good agreement with experimental results from cold compressed graphite.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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