Low-Temperature Excess Specific Heat in Oxide Glasses: Comprehensive Study of Thermometrically Observed Boson Peak

被引：4
|
作者：
Nakamura, Kensaku [1 ]
Takahashi, Yoshihiro [1 ]
Fujiwara, Takumi [1 ]
机构：
[1] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2014年 / 83卷 / 11期
关键词：
RAMAN-SCATTERING; FREQUENCY; CAPACITY; NEUTRON; STATES;
D O I：
10.7566/JPSJ.83.114603
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present the results of low-temperature (similar to 5 to 20 K) specific-heat measurements performed in numerous oxide glass systems. These results allow us to elucidate the impact of the system or component on the excess specific heat, which when plotted on C-p/T-3 vs T appears as a broad band known as the boson peak (BP). By integrating our experimental results with the data of Richet [Physica B 404, 3799 (2009); J. Chem. Phys. 136, 034703 (2012)], we demonstrate a strong negative correlation between the BP amplitude and its maximum temperature. We also describe the BP characteristics of multicomponent systems based on different binary systems in silicate glasses.
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页数：4
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