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第一性理论研究60~160GPa下固态氢结构稳定性

Structural Stability of the Solid Hydrogen Structures by First Principles Under 60~160 GPa

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【作者】 尹艳华孙美庞志康

【Author】 YIN Yan-hua;SUN Mei;PANG Zhi-kang;School of Chemical Engineering and Environment,Beijing Institute of Technology;

【机构】 北京理工大学化工与环境学院

【摘要】 为研究固态氢结构在60160GPa压力范围内的结构稳定性,采用第一性原理方法,计算了在60160GPa压力范围内固态氢Ⅱ相P63/m、P21/c、P63/mmc、Pca21和Ⅲ相C2/c 5个结构的热力学和动力学稳定性.计算结果表明,P63/m、C2/c和Pca21为候选结构,Pca21、P63/m和C2/c结构分别在6078、7890GPa和116160GPa的3个压力区间内稳定存在.

【Abstract】 To research the structural stability of the solid hydrogen structures, the thermodynamic and dynamic properties of the solid hydrogen structures of Ⅱ phase P63/m,P21/c,P63/mmc,Pca21 and Ⅲ phase C2/c were calculated by first-principles calculations under 60160GPa.The results suggest that that only P63/m,C2/c and Pca21 are competitive structures.The Pca21,P63/m,and C2/c structures can stably exist in the pressure range 6078,7890GPa,and 116160GPa,respectively.

  • 【文献出处】 北京理工大学学报 ,Transactions of Beijing Institute of Technology , 编辑部邮箱 ,2017年02期
  • 【分类号】O613.2
  • 【下载频次】82
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