基于密度泛函理论平面波赝势的第一性原理方法,对具有CoSb2结构5d过渡金属二氮化物TMN2(TM=Hf、Ta、w、Re、Os、Ir、Pt、Au)的晶格常数、电子结构和力学性能进行了计算.计算结果表明,对于该结构的二氮化物,除AuN2外,均同时满足热力学和机械稳定性标准;其中OsN2具有最高的体弹性模量和剪切模量分别为418和257GPa;态密度分析表明,过渡金属原子的5d轨道与氮原子的2p轨道之间发生了强烈的杂化现象,二者之间形成了较强共价键.
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