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arXiv 1204.2886cond-mat.mtrl-sci
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ZrO2的结构、电子和光学性质的从头计算

Structural, electronic, and optical properties of ZrO2 from ab initio calculations

Joelson Cott Garcia, L. M. R. Scolfaro, A. T. Lino, V. N. Freire, G. A. Farias, C. C. Silva, H. W. Leite Alves, S. C. P. Rodrigues, E. F. da Silva

摘要:

结构,电子和光学性质的立方,四方晶系,单斜晶相的氧化锆,从它的从头算全相对论计算,提出。在密度泛函理论和局域密度近似的框架下,采用全电子全势线性缀加平面波方法计算了配合物的电子结构.计算的载流子有效质量被证明是高度各向异性的。的介电函数,反射率和折射率的实部和虚部所获得的结果,显示出良好的协议与现有的实验结果。为了得到ZrO 2的静态介电常数,我们在电子部分中加入了光学声子的贡献,这导致单斜相的e1(0)分别沿xx,yy和zz方向的值为29.5,26.2,21.9,与实验非常一致。相对论效应,包括自旋-轨道相互作用,被证明是重要的有效质量值的更好的评估,并在详细的结构的频率依赖的复介电函数。

英文摘要:

Structural, electronic, and optical properties for the cubic, tetragonal, and monoclinic crystalline phases of ZrO2, as derived from it ab initio full-relativistic calculations, are presented. The electronic structure calculations were carried out by means of the all-electron full potential linear augmented plane wave method, within the framework of the density functional theory and the local density approximation. The calculated carrier effective masses are shown to be highly anisotropic. The results obtained for the real and imaginary parts of the dielectric function, the reflectivity, and the refraction index, show good agreement with the available experimental results. In order to obtain the static dielectric constant of ZrO2, we added to the electronic part, the optical phonons contribution, which leads to values of e1(0)~29.5, 26.2, 21.9, respectively along the xx, yy, and zz directions, for the monoclinic phase, in excellent accordance with experiment. Relativistic effects, including the spin-orbit interaction, are demonstrated to be important for a better evaluation of the effective mass values, and in the detailed structure of the frequency dependent complex dielectric function.

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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