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arXiv 1306.2063cond-mat.mtrl-sci
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CuYS2半导体结构、电子、光学和弹性性质的第一性原理计算

First-principles calculations of the structural, electronic, optical and elastic properties of the CuYS2 semiconductor

M. G. Brik

摘要:

在密度泛函理论(DFT)框架下,采用第一性原理方法研究了三元半导体CuYS 2.计算了在环境压力和升高的流体静压下的结构、电子、光学和弹性性质。该化合物被证明具有约1.342/1.389 eV的间接带隙(在广义梯度和局部密度近似下)。通过计算不同偏振态下的吸收谱、介电函数和折射率,研究了薄膜光学性质的各向异性。通过绘制杨氏模量对晶格方向的三维依赖性来可视化弹性性质的各向异性。所获得的结果,这是第一次报告,以作者的知识,可以促进评估可能的应用程序的标题材料。

英文摘要:

Ternary semiconductor CuYS2 is studied by using the first-principles methods in the density functional theory (DFT) framework. The structural, electronic, optical and elastic properties were calculated at the ambient and elevated hydrostatic pressures. The compound was shown to have an indirect band gap of about 1.342/1.389 eV (in the generalized gradient and local density approximations). The anisotropy of the optical properties was studied by calculating the absorption spectra, dielectric function and index of refraction for different polarizations. The anisotropy of the elastic properties was visualized by plotting the three-dimensional dependence of the Young's moduli on the direction in the crystal lattice. The obtained results, which are reported for the first time to the best of the author's knowledge, can facilitate assessment of possible applications of the title material.

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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