High-temperature phase transitions in dense germanium
文献类型：期刊论文
| 作者 | Kelsall, Liam C.5,7; Pena-Alvarez, Miriam5,7; Martinez-Canales, Miguel5,7; Binns, Jack3,6; Pickard, Chris J.1,2; Dalladay-Simpson, Philip6; Howie, Ross T.6; Gregoryanz, Eugene4,5,6,7 |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2021-05-07 |
| 卷号 | 154 |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/5.0047359 |
| 通讯作者 | Pena-Alvarez, Miriam(mpenaal@ed.ac.uk) |
| 英文摘要 | Through a series of high-pressure x-ray diffraction experiments combined with in situ laser heating, we explore the pressure-temperature phase diagram of germanium (Ge) at pressures up to 110 GPa and temperatures exceeding 3000 K. In the pressure range of 64-90 GPa, we observe orthorhombic Ge-IV transforming above 1500 K to a previously unobserved high-temperature phase, which we denote as Ge-VIII. This high-temperature phase is characterized by a tetragonal crystal structure, space group I4/mmm. Density functional theory simulations confirm that Ge-IV becomes unstable at high temperatures and that Ge-VIII is highly competitive and dynamically stable at these conditions. The existence of Ge-VIII has profound implications for the pressure-temperature phase diagram, with melting conditions increasing to much higher temperatures than previous extrapolations would imply. |
| WOS关键词 | X-RAY-DIFFRACTION ; HIGH-PRESSURE PHASE ; CRYSTAL-STRUCTURE ; MELTING BEHAVIOR ; IMMA PHASE ; SILICON ; GE ; SYSTEM ; GPA ; SI |
| 资助项目 | European Research Council (ERC) Grant Hecate[695527] ; UKRI Future Leaders Fellowship[Mrc-Mr/T043733/1] ; EPSRC[EP/P022561/1] ; National Science Foundation of China[11974034] |
| WOS研究方向 | Chemistry ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000646354000006 |
| 出版者 | AMER INST PHYSICS |
| 资助机构 | European Research Council (ERC) Grant Hecate ; UKRI Future Leaders Fellowship ; EPSRC ; National Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/122345]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Pena-Alvarez, Miriam |
| 作者单位 | 1.Univ Cambridge, Dept Mat Sci & Met, Cambridge, England 2.Tohoku Univ, Adv Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi, Japan 3.RMIT Univ, Sch Sci, Melbourne, Vic 3000, Australia 4.Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei, Peoples R China 5.Univ Edinburgh, Sch Phys & Astron, SUPA, Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland 6.Ctr High Pressure Sci & Technol Adv Res, Shanghai, Peoples R China 7.Univ Edinburgh, CSEC, Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland |
| 推荐引用方式 GB/T 7714 | Kelsall, Liam C.,Pena-Alvarez, Miriam,Martinez-Canales, Miguel,et al. High-temperature phase transitions in dense germanium[J]. JOURNAL OF CHEMICAL PHYSICS,2021,154. |
| APA | Kelsall, Liam C..,Pena-Alvarez, Miriam.,Martinez-Canales, Miguel.,Binns, Jack.,Pickard, Chris J..,...&Gregoryanz, Eugene.(2021).High-temperature phase transitions in dense germanium.JOURNAL OF CHEMICAL PHYSICS,154. |
| MLA | Kelsall, Liam C.,et al."High-temperature phase transitions in dense germanium".JOURNAL OF CHEMICAL PHYSICS 154(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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