Destruction of the Fermi surface underdoped high-T-c superconductors
文献类型：期刊论文
| 作者 | Norman, MR ; Ding, H ; Randeria, M ; Campuzano, JC ; Yokoya, T ; Takeuchi, T ; Takahashi, T ; Mochiku, T ; Kadowaki, K ; Guptasarma, P ; Hinks, DG |
| 刊名 | NATURE
 |
| 出版日期 | 1998 |
| 卷号 | 392期号:6672页码:157 |
| 关键词 | ANGLE-RESOLVED PHOTOEMISSION NORMAL-STATE ELECTRONIC-STRUCTURE BI2SR2CACU2O8+DELTA GAP |
| ISSN号 | 0028-0836 |
| 通讯作者 | Campuzano, JC (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. |
| 中文摘要 | The Fermi surface-the set of points in momentum space describing gapless electronic excitations-is a central concept in the theory of metals. In this context, the normal 'metallic' state of the optimally doped high-temperature superconductors is not very unusual: above the superconducting transition temperature, T-c, there is evidence for a large Fermi surface(1-3) despite the absence of well-defined elementary excitations. In contrast, the normal state of underdoped high-temperature superconductors differs in that there is evidence for a 'pseudogap' above T-c (refs 4-6). Here we examine, using angle-resolved photoemission spectroscopy, the temperature dependence of the Fermi surface in underdoped Bi2Sr2CaCu2O8+delta. We find that, on cooling the sample, the pseudogap opens up at different temperatures for different points in momentum space. This leads to an initial breakup of the Fermi surface, at a temperature T*, into disconnected arcs, which then shrink with decreasing temperature before collapsing to the point nodes of the superconducting ground state below T-c. This unusual behaviour, where the Fermi surface does not form a continuous contour in momentum space as in conventional metals, is unprecedented in that it occurs in the absence of long-range order. Moreover, although the superconducting gap below T-c evolves smoothly into the pseudogap above T-c, the pseudogap differs in its unusual temperature-dependent anisotropy, implying an intimate but non-trivial relationship between the pseudogap and the superconducting gap. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57981]  |
| 专题 | 物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文 |
| 推荐引用方式 GB/T 7714 | Norman, MR,Ding, H,Randeria, M,et al. Destruction of the Fermi surface underdoped high-T-c superconductors[J]. NATURE,1998,392(6672):157. |
| APA | Norman, MR.,Ding, H.,Randeria, M.,Campuzano, JC.,Yokoya, T.,...&Hinks, DG.(1998).Destruction of the Fermi surface underdoped high-T-c superconductors.NATURE,392(6672),157. |
| MLA | Norman, MR,et al."Destruction of the Fermi surface underdoped high-T-c superconductors".NATURE 392.6672(1998):157. |
入库方式： OAI收割
来源：物理研究所
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