Muon-spin-relaxation study of the relationship between the spin correlation and superconductivity in iron-based and high-Tc cuprate superconductors

铁基和高温铜酸盐超导体自旋关联与超导关系的μ子自旋弛豫研究

• 批准号: 23540399
• 负责人: ADACHI Tadashi
• 金额: $ 3.24万
• 依托单位: Sophia University (2013)Tohoku University (2011-2012)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540399/
• 关键词: 強相関電子系; 超電導材料・素子; 低温物性; 放射線・Ｘ線・粒子線; 磁性; 放射線・X線・粒子線; 超伝導材料・素子

In order to investigate the relationship between the spin correlation and superconductivity, we have performed muon-spin-relaxation measurements using high-quality single crystals of the impurity-substituted iron-based superconductor Fe1-y(Co,Ni,Zn)ySe0.3Te0.7 and of the electron-doped high-Tc cuprate Pr1.3-xLa0.7CexCuO4+d. Impurity-induced development of the spin correlation has been found in Fe1-y(Co,Ni,Zn)ySe0.3Te0.7, suggesting the orbital fluctuations as a glue of electron pairs. In Pr1.3-xLa0.7CexCuO4+d, it has been found that the superconductivity coexists with a short-range magnetic order at low temperatures. This novel coexistence can be understood in terms of the band picture including the strong electron correlation. Accordingly, it has been concluded that in cuprates, the spin correlation plays an important role on the appearance of superconductivity and that in iron-based superconductors, the appearance of the superconductivity is not so affected by the spin correlation.

为了研究自旋相关性与超导性之间的关系，我们利用杂质取代铁基超导体Fe1-y(Co,Ni,Zn)ySe0.3Te0的高质量单晶进行了μ子自旋弛豫测量。 .7 和电子掺杂高 Tc 铜酸盐 Pr1.3-xLa0.7CexCuO4+d。在 Fe1-y(Co,Ni,Zn)ySe0.3Te0.7 中发现了杂质引起的自旋关联的发展，表明轨道涨落是电子对的粘合剂。在Pr1.3-xLa0.7CexCuO4+d中，发现低温下超导性与短程磁序共存。这种新颖的共存可以从包括强电子相关性的能带图来理解。因此，可以得出结论，在铜酸盐中，自旋相关性对超导性的出现起着重要作用，而在铁基超导体中，超导性的出现不受自旋相关性的影响太大。

项目成果

Superconducting symmetry studied from impurity effects in single-crystal Fe1 -yMySe0.3Te0.7 (M = Co, Ni, Zn)

从单晶 Fe1 -yMySe0.3Te0.7 (M = Co、Ni、Zn) 的杂质效应研究超导对称性

• 发表时间: 2013
• 作者: T. Inabe; T. Kawamata; T. Noji; T. Adachi;Y. Koike
• 通讯作者: Y. Koike

Evolution of the Electronic State through the Reduction Annealing in Electron-Doped Pr1.3-xLa0.7CexCuO4+d (x=0.10) Single Crystals: Antiferromagnetism, Kondo Effect and Superconductivity

电子掺杂 Pr1.3-xLa0.7CexCuO4 d (x=0.10) 单晶中电子态通过还原退火的演化：反铁磁性、近藤效应和超导

• 发表时间: 2013
• 影响因子: 1.7
• 作者: T. Adachi; Y. Mori; M. Kato; T. Nishizaki; T. Sasaki; N. Kobayashi;Y. Koike
• 通讯作者: Y. Koike

In-plane Cu-O bond distribution and charge inhomogeneity in La2-xSrxCuO4 as a function of doping

La2-xSrxCuO4 中的面内 Cu-O 键分布和电荷不均匀性与掺杂的关系

• 发表时间: 2012
• 作者: N. L. Saini; H. Oyanagi; T. Adachi; T. Noji; H. Sato;Y. Koike
• 通讯作者: Y. Koike

Impurity and Magnetic Field Effects on the Stripes in Cuprates

杂质和磁场对铜酸盐条纹的影响

• 发表时间: 2012
• 影响因子: 1.7
• 作者: Y. Koike;T. Adachi
• 通讯作者: T. Adachi

Development of Cu-spin correlation in the Bi1. 74Pb0.38Sr1. 88Cu1 -yZnyO6+δhigh-temperature superconductors observed by muon spin relaxation"

μ子自旋弛豫观测到的Bi1-88Cu1-yZnyO6+δ高温超导体中Cu-自旋相关性的发展"

• 发表时间: 2011
• 作者: T. Adachi; Y. Tanabe; K. Suzuki; Y. Koike; T. Suzuki; T. Kawamata;I. Watanabe
• 通讯作者: I. Watanabe