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首页> 外文期刊>Physica, B. Condensed Matter >First-principles calculations for elastic properties of OsB2 under pressure
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First-principles calculations for elastic properties of OsB2 under pressure

机译:压力下OsB2弹性特性的第一性原理计算

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摘要

The structure, elastic properties and elastic anisotropy of orthorhombic OsB2 are investigated by density functional theory method with the ultrasoft pseudopotential scheme in the frame of the generalized gradient approximation (GGA) as well as local density approximation (LDA). The obtained structural parameters, elastic constants, elastic anisotropy and Debye temperature for OsB2 under pressure are consistent with the available experimental data and other theoretical results. It is found that the elastic constants, bulk modulus and Debye temperature of OsB2 tend to increase with increasing pressure. It is predicted that OsB2 is not a superhard material from our calculations.
机译:在广义梯度近似(GGA)和局部密度近似(LDA)的框架下,采用密度泛函理论方法用超软拟势方案研究了正交各向异性OsB2的结构,弹性性质和弹性各向异性。所获得的OsB2在压力下的结构参数,弹性常数,弹性各向异性和德拜温度与现有的实验数据和其他理论结果一致。发现OsB2的弹性常数,体积模量和德拜温度趋于随压力的增加而增加。根据我们的计算,可以预测OsB2不是超硬材料。

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