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5d过渡金属二氮化物的第一性原理研究 被引量:2

First-principles study on 5d Transition Metal Dinitrides
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摘要 基于密度泛函理论平面波赝势的第一性原理方法,对5d过渡金属TM(包含Hf,Ta,W,Re,Os,Ir,Pt,Au元素)二氮化物TMN2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,5d周期纯金属中Os具有最大的体弹性模量和剪切模量;构成的二氮化物中PtN2具有较高的体弹性模量和稳定结构,是可能的超硬材料;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,二者之间形成了共价键。 Using first-principles calculations based on density functional theory(DFT),we studied the crystal lattice constants,electronic and mechanical properties of 5d transition metal(including of Hf,Ta,W,Re,Os,Ir,Pt,Au) dinitride(TMN2) with pyrite structure.The calculation results show that Os have the max bulk modulus and shear modulus in the pure metal.For the dinitride(TMN2) with pyrite structure,PtN2 have bigger bulk modulus and stability.It is possible superhard material.From the result of density of states,...
出处 《太原理工大学学报》 CAS 北大核心 2008年第S1期23-26,共4页 Journal of Taiyuan University of Technology
关键词 5d过渡金属 二氮化物 密度泛函理论 稳定性 5d transition metal dinitride density functional theory(DFT) stability
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