A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
文献类型：期刊论文
| 作者 | Niestemski, FC ; Kunwar, S ; Zhou, S ; Li, SL ; Ding, H ; Wang, ZQ ; Dai, PC ; Madhavan, V |
| 刊名 | NATURE
 |
| 出版日期 | 2007 |
| 卷号 | 450期号:7172页码:1058 |
| 关键词 | TUNNELING SPECTROSCOPY NEUTRON-SCATTERING DENSITY STATES BI2SR2CACU2O8+DELTA ND1.85CE0.15CUO4 DISPERSION PHONONS GLUE |
| ISSN号 | 0028-0836 |
| 通讯作者 | Madhavan, V (reprint author), Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA. |
| 中文摘要 | Despite recent advances in understanding high- transition-temperature ( high-T-c) superconductors, there is no consensus on the origin of the superconducting 'glue': that is, the mediator that binds electrons into superconducting pairs. The main contenders are lattice vibrations(1,2) ( phonons) and spin- excitations(3,4), with the additional possibility of pairing without mediators(5). In conventional superconductors, phonon- mediated pairing was unequivocally established by data from tunnelling experiments(6). Proponents of phonons as the high- T-c glue were therefore encouraged by the recent scanning tunnelling microscopy experiments on hole- doped Bi2Sr2CaCu2O8-delta ( BSCCO) that reveal an oxygen lattice vibrational mode whose energy is anticorrelated with the superconducting gap energy scale(7). Here we report high-resolution scanning tunnelling microscopy measurements of the electron- doped high- T-c superconductor Pr0.88LaCe0.12CuO4 ( PLCCO) ( T-c= 24 K) that reveal a bosonic excitation ( mode) at energies of 10.5 +/- 2.5 meV. This energy is consistent with both spin- excitations in PLCCO measured by inelastic neutron scattering ( resonance mode)(8) and a low- energy acoustic phonon mode(9), but differs substantially from the oxygen vibrational mode identified in BSCCO. Our analysis of the variation of the local mode energy and intensity with the local gap energy scale indicates an electronic origin of the mode consistent with spin- excitations rather than phonons. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57849]  |
| 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 | Niestemski, FC,Kunwar, S,Zhou, S,et al. A distinct bosonic mode in an electron-doped high-transition-temperature superconductor[J]. NATURE,2007,450(7172):1058. |
| APA | Niestemski, FC.,Kunwar, S.,Zhou, S.,Li, SL.,Ding, H.,...&Madhavan, V.(2007).A distinct bosonic mode in an electron-doped high-transition-temperature superconductor.NATURE,450(7172),1058. |
| MLA | Niestemski, FC,et al."A distinct bosonic mode in an electron-doped high-transition-temperature superconductor".NATURE 450.7172(2007):1058. |
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来源：物理研究所
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