High-pressure behavior of amorphous selenium from ultrasonic measurements and Raman spectroscopy
High-pressure behavior of amorphous selenium from ultrasonic measurements and Raman spectroscopy
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DOI：
10.1063/1.4887005
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发表时间：
2014-07
影响因子：
4
通讯作者：
Z. He;Zhigang Wang;H. Y. Zhu;X. R. Liu;J. Peng;S. Hong
中科院分区：
文献类型：
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作者：
Z. He;Zhigang Wang;H. Y. Zhu;X. R. Liu;J. Peng;S. Hong
采用超声测量和室温下的拉曼散射研究了熔融急冷非晶硒（a-Se）的高压行为。在多砧装置中，在高达4.5和4.8 GPa的压力下，用两种不同的样品组件对a-Se进行超声测量。我们发现，在2.0-2.5 GPa范围内，剪切波和纵波的传播时间和声速的压力依赖性特征的斜率也出现了类似的扭结。这些扭结是独立的样品组件，表示一个内在的转变的α-硒。此外，利用Birch-Murnaghan状态方程，从声速特性推导出了a-Se的压力-体积关系，其结果与文献报道一致。原位高压拉曼散射测量的α-硒进行了在金刚石砧室与830 nm的激发线高达4.3 GPa的压力。我们发现这个角色...
The high-pressure behavior of melt-quenched amorphous selenium (a-Se) has been investigated via ultrasonic measurements and Raman scattering at room temperature. The ultrasonic measurements were conducted on a-Se in a multi-anvil apparatus with two different sample assemblies at pressures of up to 4.5 and 4.8 GPa. We discovered that similar kinks occur in the slopes of the pressure dependence characteristics of the travel time and the sound velocity in both shear and longitudinal waves in the 2.0–2.5 GPa range. These kinks are independent of the sample assemblies, indicating an intrinsic transformation of the a-Se. Additionally, we deduced the pressure-volume relationship of a-Se from the sound velocity characteristics using the Birch–Murnaghan equation of state, and the results agreed well with those of previous reports. In situ high-pressure Raman scattering measurements of a-Se were conducted in a diamond anvil cell with an 830 nm excitation line up to a pressure of 4.3 GPa. We found that the character...