arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.01675cond-mat.mtrl-sci
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氮置换和表面重构对StabilizingNon-passivated单层金刚石的作用

Roles of Nitrogen Substitution and Surface Reconstruction on StabilizingNon-passivated Single-layer Diamond

T. Pakornchote, A. Ektarawong, W. Busayaporn, U. Pinsook, T. Bovornratanaraks

摘要:

单层金刚石或金刚烷被N原子取代,帮助类金刚石结构稳定而没有任何钝化。通过表面重构,发现四分之一的N取代二金刚烷垂直堆积为NCCC,形成Pandey $π$链结构,并具有反铁磁性质。二胺烷中的半N取代,垂直堆积为NCCN,可以稳定并以二胺烷形式为主。其弹性常数较高,$C_{11}$是金刚石的2倍,而$C_{33}$仅比金刚石低21%。NCCN相是在10 GPa下的亚稳相,与其他层状氮化碳相相比,显示了可能的产生途径。

英文摘要:

Single-layer diamond or diamane is substituted by N atoms assisting the diamond-like structure to be stabilize without any passivation. One fourth of N substitution in diamane, vertically stacking as NCCC, is found to be stable by surface reconstruction forming Pandey $π$ chain structure and has an antiferromagnetic property. Half N substitution in diamane, vertically stacking as NCCN can be stable and prevails the diamane form. Its elastic constants yield high values, for example, its $C_{11}$ is as twice as diamond and its $C_{33}$ is only 21\% lower than diamond. The NCCN phase is a metastable phase at 10 GPa compared with other layered carbon nitride phases showing the possible pathway to be created.

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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