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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 >Non-Debye excess heat capacity and boson peak of binary lithium borate glasses
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Non-Debye excess heat capacity and boson peak of binary lithium borate glasses

机译：二元硼酸锂玻璃的非德拜余热容量和玻色子峰

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摘要

The non-Debye excess heat capacities of binary lithium borate glasses with different Li_2O compositions of x = 8, 14 and 22 (mol%) are investigated to understand origin of the boson peak. The low-temperature heat capacities are measured between 2 and 50 K by a relaxation calorimeter. The experimental non-Debye heat capacities with x = 14 is successfully reproduced using the excess vibrational density of states measured by inelastic neutron scattering. This finding indicates that the non-Debye heat capacities of lithium borate glasses originate from the excess vibrational density of states measureable by inelastic neutron scattering. Moreover, it is demonstrated that all of the excess heat capacity spectra lie on a single master curve by the scaling using boson peak temperature and intensity.
机译：研究了x = 8、14和22（摩尔％）的不同Li_2O组成的二元硼酸锂玻璃的非德拜过量热容量，以了解玻色子峰的起源。低温热容通过弛豫量热计测量在2至50 K之间。使用非弹性中子散射测量的过剩振动密度可以成功地再现x = 14的实验非德拜热容。该发现表明，硼酸锂玻璃的非德拜热容量源自通过非弹性中子散射可测量的状态的过量振动密度。此外，通过使用玻色子峰值温度和强度进行缩放，证明了所有多余的热容谱都位于一条主曲线上。

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