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arXiv 0807.3251cond-mat.mtrl-sci
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过渡金属二氧化物:XO $_{2}$(X=Ru,Rh,Os,Ir)的弹性性质

Elastic properties of transition metal dioxides: XO$_{2}$(X=Ru, Rh, Os, Ir)

Yanling Li, Zhi Zeng

摘要:

采用基于密度泛函理论的第一性原理计算研究了金红石型过渡金属氧化物XO $_{2}$(X=Ru,Rh,Os,Ir)的弹性性质.弹性常数,体积模量,剪切模量,杨氏模量以及泊松比。OsO $_2$和IrO $_2$具有很强的不可压缩性。这些二氧化物的硬度估计表明,它们不是超硬固体。所得到的德拜温度与过渡金属二氮化物或二硼化物的德拜温度相当。

英文摘要:

The elastic properties of rutile transition metal dioxides XO$_{2}$ (X=Ru, Rh, Os, and Ir) are investigated using first-principles calculations based on density functional theory. Elastic constants, bulk modulus, shear modulus, and Young's modulus as well as Possion ratio are given. OsO$_2$ and IrO$_2$ show strong incompressibility. The hardness estimated for these dioxides shows that they are not superhard solids. The obtained Debye temperatures are comparative to those of transition metal dinitrides or diborides.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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