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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Local structures in glassy and liquid As2Se3 - an anomalous X-ray scattering study
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Local structures in glassy and liquid As2Se3 - an anomalous X-ray scattering study

机译：玻璃态和液态As2Se3中的局部结构-异常X射线散射研究

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Anomalous X-ray scattering experiments have been performed for glassy (g-) As2Se3 at room temperature and for liquid (I-) As2Se3 at 400 degreesC in order to clarify the role of each constituent for the short- and intermediate-range order (SRO and IRO). The differential structure factors Delta S-l(Q)s close to the As and Se K edges have been obtained from a detailed analysis. The first nearest neighbour distances around both As and Se are about 0.24 +/- 0.02 nm for both g- and I-As2Se3, which would support the SRO model that g- and I-As2Se3 have an SRO similar to the corresponding crystal. The prepeak in S(Q) for g-As2Se3 seems to be dominated by a partial structure factor SA,A,(Q), which reveals the existence of the As-As IRO with a correlation length of about 0.52 nm. In I-As2Se3, however, the substitution of Se atoms into some As sites would cause a contribution in A,,S(Q) at the prepeak position. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 18]
机译：为了阐明每种成分在短程和中程顺序（SRO）中的作用，已经在室温下对玻璃态（g-）As2Se3和在400摄氏度下对液态（I-）As2Se3进行了异常X射线散射实验和IRO）。通过详细分析已经获得了接近As和Se K边缘的微分结构因子Delta S-1（Q）s。对于g-和I-As2Se3，As和Se周围的第一个最近邻居距离约为0.24 +/- 0.02 nm，这将支持SRO模型，即g-和I-As2Se3具有与相应晶体相似的SRO。 g-As2Se3的S（Q）中的前峰似乎由部分结构因子SA，A，（Q）支配，这揭示了As-As IRO的存在，其相关长度约为0.52 nm。然而，在I-As2Se3中，将Se原子替换为一些As位置会在前峰位置对A ,, S（Q）产生影响。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：18]

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