Hole doping by pressure on the 1111 pnictides CaFeAsF and SrFeAsF
文献类型：期刊论文
| 作者 | Freitas, DC ; Garbarino, G ; Weht, R ; Sow, A ; Zhu, XY ; Han, F ; Cheng, P ; Ju, J ; Wen, HH ; Nunez-Regueiro, M |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2014 |
| 卷号 | 26期号:15 |
| 关键词 | iron superconductors phase diagram pressure |
| ISSN号 | 0953-8984 |
| 通讯作者 | Freitas, DC (reprint author), CNRS, Inst Neel, 25 Ave Martyrs,BP166, F-38042 Grenoble 9, France. |
| 中文摘要 | We determine the pressure phase diagram of the 1111 compounds CaFeAsF and SrFeAsF, up to 20 GPa and down to 4 K by electrical resistivity measurements and the change of structure up to 40 GPa at room temperature. The antiferromagnetic transition temperature, as determined by the derivative peak, shows a minimum at similar to 5 GPa (10 GPa) for the Ca (Sr) compound. For CaFeAsF, superconductivity appears at this minimum, coincident with the development of a previously reported monoclinic phase. For SrFeAsF, where the orthorhombic and the monoclinic phase were reported to coexist, superconductivity exists above P >= 1 GPa. Both phase diagrams can be scaled by a shift of similar to 10 GPa pressure at which the volume of SrFeAsF and that of CaFeAsF at ambient pressure coincide. The difference of our phase diagram with that of electron-doped 1111 samples is accounted for by hole doping under pressure, which we verified through electron band structure calculations. |
| 资助信息 | Brazilian agency CAPES; Brazilian agency Cnpq; Agence Nationale de la Recherche of France [TetraFer ANR-09-BLAN-0211]; CONICET [PIP 114-201101-00376]; ANPCyT [PICT-2012-0609] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59273]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Freitas, DC,Garbarino, G,Weht, R,et al. Hole doping by pressure on the 1111 pnictides CaFeAsF and SrFeAsF[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2014,26(15). |
| APA | Freitas, DC.,Garbarino, G.,Weht, R.,Sow, A.,Zhu, XY.,...&Nunez-Regueiro, M.(2014).Hole doping by pressure on the 1111 pnictides CaFeAsF and SrFeAsF.JOURNAL OF PHYSICS-CONDENSED MATTER,26(15). |
| MLA | Freitas, DC,et al."Hole doping by pressure on the 1111 pnictides CaFeAsF and SrFeAsF".JOURNAL OF PHYSICS-CONDENSED MATTER 26.15(2014). |
入库方式： OAI收割
来源：物理研究所
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