Vibrational properties of Ba8Ga16Sn30 under high pressure
Vibrational properties of Ba8Ga16Sn30 under high pressure
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DOI：
10.1088/1742-6596/500/18/182022
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
T. Sukemura;T. Kume;T. Matsuoka;S. Sasaki;T. Onimaru;T. Takabatake
中科院分区：
文献类型：
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作者：
T. Sukemura;T. Kume;T. Matsuoka;S. Sasaki;T. Onimaru;T. Takabatake
高压拉曼散射实验进行了I型锡基包合物，Ba_8Ga_（16）Sn_（30），在室温下高达6.9 GPa。我们观察到不可逆的非晶化在6 GPa。笼中的客体原子的振动被调查高达5.8 GPa。压力引起的振动的光谱形状的演变表明，笼尺寸的减小导致客体原子从偏离中心的笼中的中心的位移。
High-pressure Raman scattering experiments were performed for type-I Sn based clathrates, Ba8Ga16Sn30, at room temperature up to 6.9 GPa. We observed irreversible amorphization at 6 GPa. The rattling vibrations of the guest atoms in the cages were investigated up to 5.8 GPa. Pressure induced evolution of spectral shape of the rattling suggested that the reduction in the cage size causes the displacement of the guest atoms from the off center to the center in the cage.