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首页> 外文期刊>Physica, B. Condensed Matter >First principles studies on the structural and electronic properties of Sr_(n1)Ti_nO_(3n1) (n=1, 2, 3, ∞)
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First principles studies on the structural and electronic properties of Sr_(n1)Ti_nO_(3n1) (n=1, 2, 3, ∞)

机译:Sr_(n1)Ti_nO_(3n1)(n = 1,2,3,∞)的结构和电子性质的第一性原理研究

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Structural and electronic properties of Sr_(n1)Ti_nO _(3n1) (n=1, 2, 3, ∞) are studied using first principles calculations. Differences in these properties of Sr_(n1)Ti _nO_(3n1) are compared. There are two kinds of O in Sr _(n1)Ti_nO_(3n1) from the structural point of view: one coordinated and two coordinated O. From analysis on the density of states projected to different atoms, the bonding nature is discussed. Although TiO bonds are mainly ionic when O atom is bonded with two Ti atoms, a certain covalent feature is clearly observed. When the O atom is bonded with only one Ti atom, the TiO bond is completely ionic. We also verified the interaction between Ti and O by analyzing the band decomposed charge densities.
机译:使用第一性原理计算研究了Sr_(n1)Ti_nO _(3n1)(n = 1、2、3,∞)的结构和电子性质。比较了Sr_(n1)Ti _nO_(3n1)这些属性的差异。从结构的角度来看,Sr _(n1)Ti_nO_(3n1)中有两种O:一种为配位O,两种为配位O。通过分析投射到不同原子上的态密度,讨论了键合性质。尽管当O原子与两个Ti原子键合时TiO键主要是离子性的,但可以清楚地观察到某些共价特征。当O原子仅与一个Ti原子键合时,TiO键完全为离子键。我们还通过分析能带分解的电荷密度来验证Ti和O之间的相互作用。

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