Microscopic electronic inhomogeneity in the high-T-c superconductor Bi2Sr2CaCu2O8+x
文献类型：期刊论文
| 作者 | Pan, SH ; O'Neal, JP ; Badzey, RL ; Chamon, C ; Ding, H ; Engelbrecht, JR ; Wang, Z ; Eisaki, H ; Uchida, S ; Guptak, AK ; Ng, KW ; Hudson, EW ; Lang, KM ; Davis, JC |
| 刊名 | NATURE
 |
| 出版日期 | 2001 |
| 卷号 | 413期号:6853页码:282 |
| 关键词 | VORTEX CORES SCATTERING PSEUDOGAP BEHAVIOR DENSITY SCALE |
| ISSN号 | 0028-0836 |
| 通讯作者 | Pan, SH (reprint author), Boston Univ, Dept Phys, Boston, MA 02215 USA. |
| 中文摘要 | The parent compounds of the copper oxide high-transition-temperature (high-T-c) superconductors are unusual insulators (so-called Mott insulators). Superconductivity arises when they are 'doped' away from stoichiometry(1). For the compound Bi2Sr2CaCu2O8+x, doping is achieved by adding extra oxygen atoms, which introduce positive charge carriers ('holes') into the CuO2 planes where the superconductivity is believed to originate. Aside from providing the charge carriers, the role of the oxygen dopants is not well understood, nor is it clear how the charge carriers are distributed on the planes. Many models of high-T-c superconductivity accordingly assume that the introduced carriers are distributed uniformly, leading to an electronically homogeneous system as in ordinary metals. Here we report the presence of an electronic inhomogeneity in Bi2Sr2CaCu2O8+x, on the basis of observations using scanning tunnelling microscopy and spectroscopy. The inhomogeneity is manifested as spatial variations in both the local density of states spectrum and the superconducting energy gap. These variations are correlated spatially and vary on the surprisingly short length scale of similar to 14 Angstrom. Our analysis suggests that this inhomogeneity is a consequence of proximity to a Mott insulator resulting in poor screening of the charge potentials associated with the oxygen ions left in the BiO plane after doping, and is indicative of the local nature of the superconducting state. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57961]  |
| 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 | Pan, SH,O'Neal, JP,Badzey, RL,et al. Microscopic electronic inhomogeneity in the high-T-c superconductor Bi2Sr2CaCu2O8+x[J]. NATURE,2001,413(6853):282. |
| APA | Pan, SH.,O'Neal, JP.,Badzey, RL.,Chamon, C.,Ding, H.,...&Davis, JC.(2001).Microscopic electronic inhomogeneity in the high-T-c superconductor Bi2Sr2CaCu2O8+x.NATURE,413(6853),282. |
| MLA | Pan, SH,et al."Microscopic electronic inhomogeneity in the high-T-c superconductor Bi2Sr2CaCu2O8+x".NATURE 413.6853(2001):282. |
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。