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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 >Raman scattering in glasses at high temperature: the Boson peak and structural relaxation kinetics in glasses
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Raman scattering in glasses at high temperature: the Boson peak and structural relaxation kinetics in glasses

机译：高温下玻璃中的拉曼散射：玻璃中的玻色子峰和结构弛豫动力学

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摘要

Inelastic light scattering as a function of temperature was carried out on various halide glasses. In their low frequency Raman spectra, all glasses show a broad feature around 50 cm(-1), the so-called Boson peak. This Boson peak is associated with the existence of an intermediate range order in the glass. The Boson peak is due to an increase in the vibrational density of state, over the Debye value, caused by localized excitations. The low frequency Raman scattering containing this dominant spectral line (Boson peak) is interpreted in its relation to the amplitude and extent of the density fluctuations in glasses. The glasses considered in this study are fragile glass formers and the measurements extend from room temperature to the glass transition region. The spectral form of the Boson peak is the same for different glasses and no strong dependence on their respective chemical compositions is observed. The degree and range of disorder in the glasses is obtained in a quantitative sense from the behavior of the Boson peaks with temperature and compared to Rayleigh-Brillouin scattering data on the same glasses. (C) 1997 Elsevier Science B.V.
机译：在各种卤化物玻璃上进行随温度变化的非弹性光散射。在其低频拉曼光谱中，所有玻璃在50 cm（-1）左右都具有宽广的特征，即所谓的玻色子峰。该玻色子峰与玻璃中存在中间范围有序有关。玻色子峰是由于局部激发引起的状态振动密度超过Debye值而引起的。包含该主要谱线（玻色子峰）的低频拉曼散射被解释为与玻璃中密度波动的幅度和程度有关。在这项研究中考虑的玻璃是易碎的玻璃形成物，并且测量范围从室温延伸到玻璃化转变区域。对于不同的玻璃，玻色子峰的光谱形式是相同的，并且未观察到对其各自化学成分的强烈依赖性。从玻色子峰的行为随温度定量地获得玻璃中无序的程度和范围，并将其与同一玻璃上的瑞利-布里渊散射数据进行比较。 （C）1997年Elsevier Science B.V.

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