Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors
文献类型：期刊论文
| 作者 | Lee, WS ; Lee, JJ ; Nowadnick, EA ; Gerber, S ; Tabis, W ; Huang, SW ; Strocov, VN ; Motoyama, EM ; Yu, G ; Moritz, B ; Huang, HY ; Wang, RP ; Huang, YB ; Wu, WB ; Chen, CT ; Huang, DJ ; Greven, M ; Schmitt, T ; Shen, ZX ; Devereaux, TP |
| 刊名 | NATURE PHYSICS
 |
| 出版日期 | 2014 |
| 卷号 | 10期号:11页码:883 |
| ISSN号 | 1745-2473 |
| 通讯作者 | Lee, WS (reprint author), SLAC Natl Accelerator Lab, SIMES, Menlo Pk, CA 94025 USA. |
| 中文摘要 | High-temperature superconductivity emerges on doping holes or electrons into antiferromagnetic copper oxides. The large energy scale of magnetic excitations, for example, compared with phonon energies, is thought to drive superconductivity with high transition temperatures (T-c). Comparing high-energy magnetic excitations of hole- and electron-doped superconductors provides an opportunity to test this hypothesis. Here, we use resonant inelastic X-ray scattering at the Cu L-3-edge to reveal collective excitations in the electron-doped cuprate Nd2-xCexCuO4. Surprisingly, magnetic excitations harden significantly across the antiferromagnetic high-temperature superconductivity phase boundary despite short-ranged antiferromagnetic correlations, in contrast to the hole-doped cuprates. Furthermore, we find an unexpected branch of collective modes in superconducting compounds, absent in hole-doped cuprates. These modes emanate from the zone centre and possess a higher temperature scale than T-c, signalling a distinct quantum phase. Despite their differences, the persistence of magnetic excitations and the existence of a distinct quantum phase are apparently universal in both hole-and electron-doped cuprates. |
| 资助信息 | US Department of Energy, Office of Basic Energy Science, Division of Materials Science and Engineering [DE-AC02-76SF00515]; NSF; NSF MRSEC program; Swiss NSF [P2EZP2_148737] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59391]  |
| 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 | Lee, WS,Lee, JJ,Nowadnick, EA,et al. Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors[J]. NATURE PHYSICS,2014,10(11):883. |
| APA | Lee, WS.,Lee, JJ.,Nowadnick, EA.,Gerber, S.,Tabis, W.,...&Devereaux, TP.(2014).Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors.NATURE PHYSICS,10(11),883. |
| MLA | Lee, WS,et al."Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors".NATURE PHYSICS 10.11(2014):883. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。