Bulk electronic states of high-Tc cuprate superconductors studied by high-resolution angle-resolved photoemission spectroscopy

通过高分辨率角分辨光电子能谱研究高温铜酸盐超导体的体电子态

• 批准号: 21340088
• 负责人: SATO Takafumi
• 金额: $ 12.4万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21340088/
• 关键词: 光電子分光; 超伝導; 銅酸化物; 高温超伝導体

We have constructed low-energy ultrahigh-resolution photoemission spectrometer to elucidate the bulk electronic states in the vicinity of the Fermi level in high-temperature cuprate superconductors, and have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) studies of cuprates and related materials. We have found an existence of two different types of pseudogaps above superconducting transition temperature in single- and multi-layered Bi-based cuprates by the systematic temperature- and momentum-dependent ARPES measurements. In addition, we have clarified the electronic states of related materials, such as cobalt oxides and iron-based superconductors, and revealed characteristic similarities/dissimilarities among these superconductors, which are a key to the deeper understanding of the mechanism of high-temperature superconductivity.

我们建立了低能超高分辨光电子能谱仪，用于研究高温铜氧化物超导体费米能级附近的体电子态，并对铜氧化物及相关材料进行了高分辨角分辨光电子能谱（ARPES）研究。我们已经发现存在两种不同类型的赝隙超导转变温度以上的单层和多层Bi基铜氧化物的系统的温度和动量相关的ARPES测量。此外，我们还澄清了相关材料的电子状态，如钴氧化物和铁基超导体，并揭示了这些超导体之间的特征相似性/差异性，这是深入理解高温超导机制的关键。

项目成果

LaFe_2P_2の高分解能ARPES

LaFe_2P_2 的高分辨率 ARPES

• 发表时间: 2011
• 作者: A. Motohashi and S. Okuma;T. Osada;求幸年;中山耕輔
• 通讯作者: 中山耕輔

鉄系超伝導におけるディラック電子

铁基超导中的狄拉克电子

• 发表时间: 2011
• 作者: Y.Kozuka;et al.;佐藤宇史
• 通讯作者: 佐藤宇史

High-resolution ARPES study of C8AC8 (A=K, Rb)

C8AC8 (A=K, Rb) 的高分辨率 ARPES 研究

• 发表时间: 2012
• 作者: Y.Kozuka;et al.;H. Ishizuka and Y. Motome;M. Takigawa;James Kleeman
• 通讯作者: James Kleeman

Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)2As2

• DOI: 10.1103/physrevb.87.094513
• 发表时间: 2012-11
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: N. Xu;P. Richard;X.-P. Wang;X. Shi;A. Roekeghem;T. Qian;E. Ieki;K. Nakayama;T. Sato;E. Rienks;S. Thirupathaiah;J. Xing;H. Wen;M. Shi;T. Takahashi;H. Ding

Two Pseudogaps with Different Energy Scales at the Antinode of the High-Temperature Bi2Sr2CuO6Superconductor Using Angle-Resolved Photoemission Spectroscopy

利用角分辨光电发射光谱研究高温 Bi2Sr2CuO6 超导体波腹处两个不同能级的赝能隙

• DOI: 10.1103/physrevb.83.224509
• 发表时间: 2011
• 期刊: Phys. Rev. B
• 作者: K. Nakayama;T. Sato;Y.-M. Xu;Z.-H.Pan;P. Richard;H. Ding;H.-H. Wen;K. Kudo;T. Sasaki;N. Kobayashi;and T. Takahashi
• 通讯作者: and T. Takahashi