Pressure-induced isostructural phase transition and charge transfer in superconducting FeSe
文献类型：期刊论文
| 作者 | Yu, ZH; Xu, M; Yan, ZP; Yan, H; Zhao, JG; Patel, U; Brewe, DL; Heald, SM; Ma, JY; Guo, YF |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2018 |
| 卷号 | 767期号:-页码:811-819 |
| 关键词 | HIGH-TEMPERATURE SUPERCONDUCTIVITY X-RAY-DIFFRACTION ELECTRONIC-STRUCTURE MAGNETIC ORDER FILMS NEMATICITY COLLAPSE CRYSTAL STATE |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2018.07.161 |
| 文献子类 | 期刊论文 |
| 英文摘要 | We present extensive investigations of the crystallographic phase diagram and electronic properties of the Fe-based superconductor FeSe under extreme conditions (high pressure (HP) and low temperature (LT)) by synchrotron X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS). An isostructural phase transition (Tetragonal (T) -> high-pressure Tetragonal (T')) is discovered in FeSe at similar to 2.8 GPa based on the axial ratio c/a with finer pressure step as observed in Fe-As-based superconductor such as EuFe2As2. We also find a pressure-induced T' -> MnP-type phase transition at 7.6 GPa in FeSe, which is consistent with the documented pressure-induced high-spin -> low-spin transition (similar to 6-7 GPa). These results reveal the pressure-induced structural phase transition sequence in FeSe at room temperature to be T -> T' -> T'+MnP-type at pressures of 0-10.6 GPa, enriching the crystallographic phase diagram. The HPLT XRD data also indicate that a sluggish structural phase transition (Cmma -> Pnma) begins at 7.5 GPa, and these two phases coexist up to 26.5 GPa. The HP X-ray absorption near-edge spectroscopy (XANES) measurement shows that E-o of Se experiences a pressure-induced shift to high energy, evidencing strongly charge transfer between Fe and Se under high pressure. Our results shed lights on the correlation between crystallographic/electronic structure and superconductivity in this material. (C) 2018 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31074]  |
| 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.Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA 2.Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA 3.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China 4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 5.Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China 6.Harbin Inst Technol, Dept Phys, Harbin 150080, Heilongjiang, Peoples R China 7.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, ZH,Xu, M,Yan, ZP,et al. Pressure-induced isostructural phase transition and charge transfer in superconducting FeSe[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,767(-):811-819. |
| APA | Yu, ZH.,Xu, M.,Yan, ZP.,Yan, H.,Zhao, JG.,...&Wang, L.(2018).Pressure-induced isostructural phase transition and charge transfer in superconducting FeSe.JOURNAL OF ALLOYS AND COMPOUNDS,767(-),811-819. |
| MLA | Yu, ZH,et al."Pressure-induced isostructural phase transition and charge transfer in superconducting FeSe".JOURNAL OF ALLOYS AND COMPOUNDS 767.-(2018):811-819. |
入库方式： OAI收割
来源：上海应用物理研究所
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