Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films
文献类型：期刊论文
| 作者 | He, SL ; He, JF ; Zhang, WH ; Zhao, L ; Liu, DF ; Liu, X ; Mou, DX ; Ou, YB ; Wang, QY ; Li, Z ; Wang, LL ; Peng, YY ; Liu, Y ; Chen, CY ; Yu, L ; Liu, GD ; Dong, XL ; Zhang, J ; Chen, CT ; Xu, ZY ; Chen, X ; Ma, X ; Xue, QK ; Zhou, XJ |
| 刊名 | NATURE MATERIALS
 |
| 出版日期 | 2013 |
| 卷号 | 12期号:7页码:605 |
| ISSN号 | 1476-1122 |
| 通讯作者 | He, SL (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China. |
| 中文摘要 | The recent discovery of possible high-temperature superconductivity in single-layer FeSe films(1,2) has generated significant experimental and theoretical interest(3,4). In both the cuprate(5,6) and the iron-based(7-11) high-temperature superconductors, superconductivity is induced by doping charge carriers into the parent compound to suppress the antiferromagnetic state. It is therefore important to establish whether the superconductivity observed in the single-layer sheets of FeSe-the essential building blocks of the Fe-based superconductors-is realized by undergoing a similar transition. Here we report the phase diagram for an FeSe monolayer grown on a SrTiO3 substrate, by tuning the charge carrier concentration over a wide range through an extensive annealing procedure. We identify two distinct phases that compete during the annealing process: the electronic structure of the phase at low doping (N phase) bears a clear resemblance to the antiferromagnetic parent compound of the Fe-based superconductors, whereas the superconducting phase (S phase) emerges with the increase in doping and the suppression of the N phase. By optimizing the carrier concentration, we observe strong indications of superconductivity with a transition temperature of 65 +/- 5 K. The wide tunability of the system across different phases makes the FeSe monolayer ideal for investigating not only the physics of superconductivity, but also for studying novel quantum phenomena more generally. |
| 资助信息 | NSFC [10734120]; MOST of China [2011CB921703, 2011CB605903, 2009CB929400, 2012CB921702] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57326]  |
| 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 | He, SL,He, JF,Zhang, WH,et al. Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films[J]. NATURE MATERIALS,2013,12(7):605. |
| APA | He, SL.,He, JF.,Zhang, WH.,Zhao, L.,Liu, DF.,...&Zhou, XJ.(2013).Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films.NATURE MATERIALS,12(7),605. |
| MLA | He, SL,et al."Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films".NATURE MATERIALS 12.7(2013):605. |
入库方式： OAI收割
来源：物理研究所
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