Stoichiometric evolutions of PH3 under high pressure: implication for high-T-c superconducting hydrides
文献类型：期刊论文
| 作者 | Yuan, Y; Li, YW; Fang, GY; Liu, GT; Pei, CY; Li, X; Zheng, HY; Yang, K; Wang, L |
| 刊名 | NATIONAL SCIENCE REVIEW
 |
| 出版日期 | 2019 |
| 卷号 | 6期号:3页码:524-531 |
| 关键词 | CRYSTAL-STRUCTURE TRANSITION-TEMPERATURE BLACK PHOSPHORUS PHOSPHINE SPECTRUM RAMAN |
| ISSN号 | 2095-5138 |
| DOI | 10.1093/nsr/nwz010 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Thesuperconductivity of hydrides under high pressure has attracted a great deal of attention since the recent observation of the superconducting transition at 203 K in strongly compressed H2S. It has been realized that the stoichiometry of hydrides might change under high pressure, which is crucial in understanding the superconducting mechanism. In this study, PH3 was studied to understand its superconducting transition and stoichiometry under high pressure using Raman, IR and X-ray diffraction measurements, as well as theoretical calculations. PH3 is stable below 11.7 GPa and then it starts to dehydrogenate through two dimerization processes at room temperature and pressures up to 25 GPa. Two resulting phosphorus hydrides, P2H4 and P4H6, were verified experimentally and can be recovered to ambient pressure. Under further compression above 35 GPa, the P4H6 directly decomposed into elemental phosphorus. Low temperature can greatly hinder polymerization/decomposition under high pressure and retains P4H6 up to at least 205 GPa. The superconductivity transition temperature of P4H6 is predicted to be 67 K at 200 GPa, which agrees with the reported result, suggesting that it might be responsible for superconductivity at higher pressures. Our results clearly show that P2H4 and P4H6 are the only stable P-H compounds between PH3 and elemental phosphorus, which is helpful for shedding light on the superconducting mechanism. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32216]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China; 2.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China; 3.Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China; 4.Wenzhou Univ, Coll Chem & Mat Engn, Key Lab Carbon Mat Zhejiang Prov, Wenzhou 325035, Peoples R China; 5.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201203, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Y,Li, YW,Fang, GY,et al. Stoichiometric evolutions of PH3 under high pressure: implication for high-T-c superconducting hydrides[J]. NATIONAL SCIENCE REVIEW,2019,6(3):524-531. |
| APA | Yuan, Y.,Li, YW.,Fang, GY.,Liu, GT.,Pei, CY.,...&Wang, L.(2019).Stoichiometric evolutions of PH3 under high pressure: implication for high-T-c superconducting hydrides.NATIONAL SCIENCE REVIEW,6(3),524-531. |
| MLA | Yuan, Y,et al."Stoichiometric evolutions of PH3 under high pressure: implication for high-T-c superconducting hydrides".NATIONAL SCIENCE REVIEW 6.3(2019):524-531. |
入库方式： OAI收割
来源：上海应用物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。