First-principles calculation of elastic and thermodynamic properties of copper nitride

被引:5
|
作者
Li Shi-Na [1 ]
Liu Yong [1 ]
机构
[1] Yanshan Univ, Coll Sci, Qinhuangdao 066004, Peoples R China
基金
中国国家自然科学基金;
关键词
thermodynamic properties; elastic constants; first-principles; Cu3N; ELECTRONIC-STRUCTURE; FILMS; CU; GROWTH; SOLIDS;
D O I
10.7498/aps.59.6882
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A first-principles full-potential linearized augmented plane wave (FP-LAPW) method based on the density functional theory is applied to the study of the static equilibrium lattice structure as well as the elastic constants of the cubic anti-ReO3 structural copper nitride (Cu3N). The quasi-harmonic Debye model, in which the phononic effects are considered, is used to investigate the thermodynamic properties of Cu3N. The pressure and temperature dependences of lattice constant, heat capacity and thermal expansion coefficient are successfully obtained. The bulk modulus and Debye temperature are also calculated at different pressures and temperatures.
引用
收藏
页码:6882 / 6888
页数:7
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