arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.02048cond-mat.mtrl-sci
收藏

不可压缩碳化物和氮化物的力学性能和电子结构:第一性原理研究

Mechanical properties and electronic structure of the incompressible rhenium carbides and nitrides: A first-principles study

Naihua Miao, Baisheng Sa, Jian Zhou, Zhimei Sun, Rajeev Ahuja

摘要:

利用第一性原理计算,研究了新合成的不可压缩化合物Re 2 C、Re 2 N、Re 3 N和一个类似化合物Re 3 C的结构稳定性、力学性质和电子结构.我们的结果与现有的实验和理论数据吻合得很好。建议的Re 3C被证明是精力充沛,机械和动态稳定,也不可压缩。此外,这些化合物的不可压缩性来源于Re的5d轨道与C或N的2 p轨道杂化的强共价键特征,以及相互连接的键的锯齿形拓扑结构,例如,Re-Re、Re-C或Re-N键。

英文摘要:

By means of first-principles calculations, the structural stability, mechanical properties and electronic structure of the newly synthesized incompressible Re2C, Re2N, Re3N and an analogous compound Re3C have been investigated. Our results agree well with the available experimental and theoretical data. The proposed Re3C is shown to be energetically, mechanically and dynamically stable and also incompressible. Furthermore, it is suggested that the incompressibility of these compounds is originated from the strong covalent bonding character with the hybridization of 5d orbital of Re and the 2p orbital of C or N, and a zigzag topology of interconnected bonds, e.g., Re-Re, Re-C or Re-N bonding.

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。

↑