Revisiting local structural changes in GeO 2 glass at high pressure
文献类型：期刊论文
| 作者 | Wang Y(王研) ; Y. Hurong, G. Zhiying, J. Quanjie, W. Yan, A. Pengfei, G. Yu, L. Yaxiang and C. Dongliang; An PF(安鹏飞); Gong Y(宫宇); Liang YX(梁雅翔); Chen DL(陈栋梁); Dong JC(董俊才); Juncai, D.; Guo ZY(郭志英); Jia QJ(贾全杰)
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| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
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| 出版日期 | 2017 |
| 卷号 | 29期号:46页码:465401 |
| 关键词 | high pressure polyamorphism network-forming glass XAFS |
| ISSN号 | 0953-8984 |
| DOI | 10.1088/1361-648X/aa8d50 |
| 文献子类 | Article |
| 英文摘要 | Despite the great importance in fundamental and industrial fields, understanding structural changes for pressure-induced polyamorphism in network-forming glasses remains a formidable challenge. Here, we revisited the local structural transformations in GeO2 glass up to 54 GPa using x-ray absorption fine structure (XAFS) spectroscopy via a combination diamond anvil cell and polycapillary half-lens. Three polyamorphic transitions can be clearly identified by XAFS structure refinement. First, a progressive increase of the nearest Ge-O distance and bond disorder to a maximum at similar to 5-16 GPa, in the same pressure region of previously observed tetrahedral-octahedral transformation. Second, a marked decrease of the nearest Ge-O distance at similar to 16-22.6 GPa but a slight increase at similar to 22.6-32.7 GPa, with a concomitant decrease of bond disorder. This stage can be related to a second-order-like transition from less dense to dense octahedral glass. Third, another decrease in the nearest Ge-O distance at similar to 32.7-41.4 GPa but a slight increase up to 54 GPa, synchronized with a gradual increase of bond disorder. This stage provides strong evidence for ultrahigh-pressure polyamorphism with coordination number >6. Furthermore, cooperative modification is observed in more distant shells. Those results provide a unified local structural picture for elucidating the polyamorphic transitions and densification process in GeO2 glass. |
| 电子版国际标准刊号 | 1361-648X |
| WOS关键词 | CACL2-TYPE GERMANIUM DIOXIDE ; RUTILE-TYPE ; POLYAMORPHISM ; SPECTROSCOPY |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000413316400001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284828]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang Y,Y. Hurong, G. Zhiying, J. Quanjie, W. Yan, A. Pengfei, G. Yu, L. Yaxiang and C. Dongliang,An PF,et al. Revisiting local structural changes in GeO 2 glass at high pressure[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2017,29(46):465401. |
| APA | 王研.,Y. Hurong, G. Zhiying, J. Quanjie, W. Yan, A. Pengfei, G. Yu, L. Yaxiang and C. Dongliang.,安鹏飞.,宫宇.,梁雅翔.,...&贾全杰.(2017).Revisiting local structural changes in GeO 2 glass at high pressure.JOURNAL OF PHYSICS-CONDENSED MATTER,29(46),465401. |
| MLA | 王研,et al."Revisiting local structural changes in GeO 2 glass at high pressure".JOURNAL OF PHYSICS-CONDENSED MATTER 29.46(2017):465401. |
入库方式： OAI收割
来源：高能物理研究所
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