Structure and bonding in YH_x as derived from elastic and inelastic light scattering

J. Schoenes; A. Borgschulte; A.-M. Carsteanu

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Structure and bonding in YH_x as derived from elastic and inelastic light scattering

机译：弹性和非弹性光散射在YH_x中的结构和键合

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The optical properties in the visible and infrared (IR) as well as the Raman effect are reported for thin films of YH_x with 2<=x<=3. From an analysis of the IR spectra, the Szigeti effective charges have been derived. It is found that in the insulating gamma phase (x approx= 3) hydrogen is negatively charged with a transfer of about 0.5 e to every hydrogen atom. Raman scattering spectra display one line in YH_2 and up to 13 lines in YH_3. A comparison with spectra of deuterated samples allows to identify hydrogen vibrations. An analysis of the polarization dependence evidences that the structure is non-centrosymmetric. The results support models for the electronic structure which assume strong electron correlations.

机译：据报道，YH_x薄膜的2 <= x <= 3可见光和红外（IR）光学特性以及拉曼效应。通过对IR光谱的分析，得出了Szigeti有效电荷。发现在绝缘的γ相（x约= 3）中，氢带负电荷，每个氢原子的转移量约为0.5 e。拉曼散射光谱在YH_2中显示1条线，在YH_3中显示13条线。与氘代样品的光谱进行比较可以识别氢振动。对偏振依赖性的分析表明该结构是非中心对称的。结果支持了具有强电子相关性的电子结构模型。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2003年第0期|共7页
作者
J. Schoenes; A. Borgschulte; A.-M. Carsteanu;
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正文语种 eng
中图分类合金学与各种性质合金;
关键词
Thin films; Vapor deposition; Crystal structure and symmetry; Light absorption and reflection; Inelastic light scattering;

机译：薄膜;蒸气沉积;晶体结构和对称性;光吸收和反射;非弹性光散射;

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机译：弹性和非弹性光散射在YH_x中的结构和键合
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Structure and bonding in YH_x as derived from elastic and inelastic light scattering

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