An application of NPD to double-stage diamond anvil cells: XAS spectra of rhenium metal under high pressures above 300 GPa
An application of NPD to double-stage diamond anvil cells: XAS spectra of rhenium metal under high pressures above 300 GPa
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NPD 在双级金刚石压砧中的应用：300 GPa 以上高压下金属铼的 XAS 谱
DOI：
10.1080/08957959.2019.1702174
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发表时间：
2019
影响因子：
2
通讯作者：
Irifune T.
中科院分区：
文献类型：
--
作者：
Kuramochi K.;Ishimatsu N.;Sakai T.;Kawamura N.;Irifune T.
首次将双级金刚石对顶砧装置应用于金属铼的X射线吸收光谱研究。通过使用高稳定性的亚微米级X射线束，成功地在第二级砧座之间的小空间中封装的样品的边缘处观察到XAS谱。压力产生超过300 GPa的评估由压力引起的移动的扩展X射线吸收精细结构（EXAFS）振荡的边缘。随着压力的增加，边缘的白线轮廓变宽，这表明Reband结构发生了变化。目前的结果表明，XAS技术与ds-DAC相结合作为超高压下晶体结构和电子结构探针的高能力。
We present the first application of double-stage diamond anvil cells (ds-DACs) to X-ray absorption spectroscopy (XAS) of Rhenium (Re) metal. By using highly stable and sub-micron sized X-ray beam, XAS spectra were successfully observed at the-edges from the sample encapsulated in the small space between the second-stage anvils. The pressure generation exceeding 300 GPa was evaluated by the pressure-induced shift of extended X-ray absorption fine structure (EXAFS) oscillation at the-edge. The profile of white-line at the-edges broadened with increasing pressure, which indicates the modification of the Reband structure. The present results demonstrate the high ability of XAS technique combined with ds-DACs as a probe for crystal structure and electronic structure under ultrahigh pressure.