Ab initio study of the structural and optical properties of orthorhombic ternary nitride crystals

Ab initio study of the structural and optical properties of orthorhombic ternary nitride crystals
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斜方三元氮化物晶体结构和光学性质的从头算研究

DOI:
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发表时间:
2001
期刊:
影响因子:
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通讯作者:
Ming
Ming
中科院分区:
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文献类型:
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作者:
Jung Y. Huang;L. Tang;Ming

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用第一性原理计算方法对正交晶系三元氮化物晶体的结构、光学和力学性质进行了理论分析。我们的研究结果表明,这些氮化物具有相当大的光学带隙(4-6 eV),二阶非线性光学极化率(13- 18 pm V-1),体积模量170-370 GPa。因此,这些材料可用于光学和保护涂层应用。我们的分析与带的带和原子物种投影技术不仅产生有用的信息,材料的性能,但也提供了深入了解正交三元氮化物的机械和光学性能的基本理解。(Some本文中的数字仅在电子版中以彩色显示)
The structural, optical and mechanical properties of orthorhombic ternary nitride crystals have been analysed theoretically with first-principles calculation. Our results indicate that these nitrides possess fairly large optical bandgap (4–6 eV), second-order nonlinear optical susceptibility (13– 18 pm V −1 ), and bulk modulus 170–370 GPa. Therefore these materials could be useful for optical and protective coating applications. Our analysis with the band-by-band and atomic species projection techniques not only yields useful information about material properties, but also provides deep insight into the fundamental understanding of the mechanical and optical properties of orthorhombic ternary nitrides. (Some figures in this article are in colour only in the electronic version)