Mechanical stabilities of K4 carbon and K4-like NaC2

Mechanical stabilities of K4 carbon and K4-like NaC2
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K4 碳和类 K4 NaC2 的机械稳定性

DOI:
10.1016/j.jpcs.2012.07.013
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发表时间:
2012
期刊:
Journal of Physics and Chemistry of Solids.
影响因子:
--
通讯作者:
Tadafumi Adschiri,
Tadafumi Adschiri,
中科院分区:
--
文献类型:
--
作者:
Bin Wen;Seiichi Takami;Yoshiyuki Kawazo;Tadafumi Adschiri,

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通过第一性原理计算研究了 K4carbon 和 K4-like NaC2 的机械稳定性。计算了作为各向同性变形和体积守恒四方和三角变形函数的总能量。对于 K4carbon,总能量在各向同性和三角变形中表现出最小值,但在四方变形中表现出最大值。相比之下,K4-like NaC2 的总能量在所有三种变形下都显示出最小值。这些结果表明K4carbon不是亚稳相,但K4-like NaC2是亚稳相。此外,还讨论了类K4 NaC2的生成热。
The mechanical stabilities of K4carbon and K4-like NaC2have been studied by performing first-principle calculations. Total energies as functions of isotropic deformations and volume-conserving tetragonal and trigonal deformations have been calculated. For K4carbon, the total energy shows a minimum for isotropic and trigonal deformations, but exhibits maxima for tetragonal deformation. In contrast, the total energy of K4-like NaC2shows a minimum under all three deformations. These results indicate that K4carbon is not a metastable phase, but that K4-like NaC2is a metastable phase. In addition, the heat of formation of K4-like NaC2is discussed.
利兹大学/谢菲尔德大学(英国)
DOI: --
发表时间: --
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FCC、BCC 和 HCP 金属中的质子运动
DOI: 10.1103/physrevb.19.1976
发表时间: 1979
期刊:
影响因子: --
作者:
S. Prakash;J. Bonnet;P. Lucasson
通讯作者: P. Lucasson