Disappearance of nodal gap across the insulator-superconductor transition in a copper-oxide superconductor
文献类型：期刊论文
| 作者 | Peng, YY ; Meng, JQ ; Mou, DX ; He, JF ; Zhao, L ; Wu, Y ; Liu, GD ; Dong, XL ; He, SL ; Zhang, J ; Wang, XY ; Peng, QJ ; Wang, ZM ; Zhang, SJ ; Yang, F ; Chen, CT ; Xu, ZY ; Lee, TK ; Zhou, XJ |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2013 |
| 卷号 | 4 |
| ISSN号 | 2041-1723 |
| 通讯作者 | Zhou, XJ (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 parent compound of the copper-oxide high-temperature superconductors is a Mott insulator. Superconductivity is realized by doping an appropriate amount of charge carriers. How a Mott insulator transforms into a superconductor is crucial in understanding the unusual physical properties of high-temperature superconductors and the superconductivity mechanism. Here we report high-resolution angle-resolved photoemission measurement on heavily underdoped Bi2Sr2-xLaxCuO6+delta system. The electronic structure of the lightly doped samples exhibit a number of characteristics: existence of an energy gap along the nodal direction, d-wave-like anisotropic energy gap along the underlying Fermi surface, and coexistence of a coherence peak and a broad hump in the photoemission spectra. Our results reveal a clear insulator-superconductor transition at a critical doping level of similar to 0.10 where the nodal energy gap approaches zero, the three-dimensional antiferromagnetic order disappears, and superconductivity starts to emerge. These observations clearly signal a close connection between the nodal gap, antiferromagnetism and superconductivity. |
| 资助信息 | NSFC [11190022]; MOST of China [2011CB921703, 2011CB605903] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56895]  |
| 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 | Peng, YY,Meng, JQ,Mou, DX,et al. Disappearance of nodal gap across the insulator-superconductor transition in a copper-oxide superconductor[J]. NATURE COMMUNICATIONS,2013,4. |
| APA | Peng, YY.,Meng, JQ.,Mou, DX.,He, JF.,Zhao, L.,...&Zhou, XJ.(2013).Disappearance of nodal gap across the insulator-superconductor transition in a copper-oxide superconductor.NATURE COMMUNICATIONS,4. |
| MLA | Peng, YY,et al."Disappearance of nodal gap across the insulator-superconductor transition in a copper-oxide superconductor".NATURE COMMUNICATIONS 4(2013). |
入库方式： OAI收割
来源：物理研究所
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