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首页> 外文期刊>IOSR journal of electrical and electronics engineering >A Study Of The Electronic Band Structure And Vibrational Properties Of The Chalcopyrite Cuals_2
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A Study Of The Electronic Band Structure And Vibrational Properties Of The Chalcopyrite Cuals_2

机译:Chalcostite Cuals_2的电子带结构和振动性能研究

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The electronic band structure of the ChalcopyriteCuAIS2and its vibrational properties using the pseudopotential method within density fimctional theory (DFT) and density fimdional perturbation theory (DFPT) frameworks respectively. LDA+U technique and the projector augmented wave (PAW) was used in for the electronic band structure calculations, while the norm-conserving pseudopotentials were used for the DFPT computations. The calculated results showed that CuAlS_2 is a semiconductor with a wide band gap energy value of 3.13 eV. It was also discovered that the Γ to Z and Γ to M transition are critical points in the structure of the material. The vibrational study reveal that CuAlSynight not be dynamically stable as a result of it yielding negative frequencies consistently.
机译:Chalcopyrecuais2的电子带结构分别使用密度融合理论(DFT)内的伪软件方法和密度FIMDION扰动理论(DFPT)框架的振动性能。 LDA + U技术和投影机增强波(PAW)用于电子频带结构计算,而标准节省伪能量用于DFPT计算。 计算结果表明,Cuals_2是具有3.13eV的宽带隙能量值的半导体。 还发现,γ至z和γ至m转变是材料结构中的关键点。 振动研究表明,由于它始终如一地产生负频率,Cualsynight不会动态稳定。

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