arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.5200cond-mat.mtrl-sci
收藏

掺氢立方金刚石及n型金刚石的晶体结构

Hydrogen-doped cubic diamond and the crystal structure of n-diamond

Bin Wen, Roderick Melnik, Shan Yao, Tingju Li

摘要:

为了理解n型金刚石的晶体结构,采用第一性原理计算研究了掺氢金刚石模型。特别是,氢浓度依赖的弹性常数和晶格参数的掺氢金刚石进行了分析。我们的结果表明,当氢浓度小于19原子%时,H掺杂金刚石机械稳定。当氢浓度为约4原子%时,优化后的掺氢金刚石的晶格参数、模拟XRD图谱和电子性质与相应的n型金刚石的实验值吻合较好。结果表明,n型金刚石很可能是掺氢金刚石。

英文摘要:

To understand the crystal structure of n-diamond, a hydrogen-doped (H-doped) diamond model has been investigated using first principles calculations. In particular, hydrogen concentration dependent elastic constants and lattice parameters for the H-doped diamond have been analyzed. Our results indicate that when the hydrogen concentration is less than 19 at.%, the H-doped diamond is mechanically stable. When the hydrogen concentration is about 4 at.%, the optimized lattice parameter, simulated XRD pattern and electronic properties for the H-doped diamond all agree well with the corresponding experimental values of n-diamond. The results imply that the n-diamond is likely to be an H-doped diamond.

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。

↑