Electronic properties of high-Tc cuprates studied by laser-based angle- and time-resolved photoemission spectroscopy

通过激光角分辨光电子能谱研究高 Tc 铜酸盐的电子特性

• 批准号: 24740218
• 负责人: KONDO Takeshi
• 金额: $ 2.83万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740218/
• 关键词: 角度分解光電子分光; 酸化物高温超伝導体; 酸化物高温超伝導; 超伝導ギャップ; 擬ギャップ; 準粒子分散; フェルミ面

The high temperature superconductivity was found in copper oxide around 30 years ago. Since then, a lot of effort was applied to elucidate the superconducting mechanism. Nevertheless, the community has not yet reached consensus on it.The superconductivity occurs at low temperatures by generating coupled electrons, which can avoid scattering from the lattice vibration and impurities. In order to clarify the origin of the high temperature superconductivity, it is crucial to identify the "glue" causing the electron pairs. In this study, we identify the collective modes strongly coupled with conduction electrons of the copper oxide through the detailed investigation of electronic structure, which is possibly related to the superconductivity in the material.

大约30年前，人们在氧化铜中发现了高温超导性。从那时起，人们付出了大量的努力来阐明超导机制。尽管如此，学术界尚未达成共识。超导性是在低温下通过产生耦合电子而实现的，可以避免晶格振动和杂质的散射。为了阐明高温超导的起源，识别产生电子对的“粘合剂”至关重要。在本研究中，我们通过对电子结构的详细研究，确定了与氧化铜的传导电子强耦合的集体模式，这可能与材料的超导性有关。

项目成果

Anomalous doping variation of energy scale in the nodal low-energy feature of (Bi,Pb)2(Sr,La)2CuO6+d revealed by laser-based angle-resolved photoemission spectroscopy

激光角分辨光电子能谱揭示(Bi,Pb)2(Sr,La)2CuO6d节点低能特征中能级的异常掺杂变化

• 发表时间: 2013
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Kenta Kamizono;Masayoshi Ichimiya;Hiroyuki Murata;Hajime Ishihara;and Masaaki Ashida;新見康洋;菅原克明;Takeshi Kondo
• 通讯作者: Takeshi Kondo

銅酸化物高温超伝導体Bi2Sr2CaCu2O8+dのノード近傍で解く電子対ギャップの成り立ち：レーザー励起型角度分解光電子分光

氧化铜高温超导体Bi2Sr2CaCu2O8+d中节点附近电子对间隙的起源：激光激发角分辨光电子能谱

• 发表时间: 2014
• 作者: 近藤猛;Walid Malaeb;石田行章;笹川崇男;遠山貴己;辛埴
• 通讯作者: 辛埴

Observation of a Quadratic Fermi Node in a 3D Strongly Correlated Semimetal by Angle-Resolved Photoemission Spectroscopy

通过角分辨光电发射光谱观察 3D 强关联半金属中的二次费米节点

• 发表时间: 2014
• 作者: Takeshi Kondo;M. Nakayama;R. Chen;J.J. Ishikawa;E.-G. Moon;H. Kanai;T. Yamamoto;Y. Ota;W. Malaeb;Y. Ishida;R. Yoshida;H. Yamamoto;M. Matsunami;S. Kimura;S. Nakatsuji;L. Balents;S. Shin
• 通讯作者: S. Shin

レーザー励起型角度分解光電子分光を用いて研究した銅酸化物高温超伝導体の準粒子分散

使用激光刺激角分辨光电子能谱研究铜酸盐高温超导体中的准粒子色散

• 发表时间: 2012
• 作者: A. Nakamura;Y. Hiranaka;M. Hedo;T. Nakama;Y. Tatetsu;T. Maehira;Y. Miura;A. Mori;H. Tsutsumi;Y. Hirose;K. Mitamura;K. Sugiyama;M. Hagiwara;F. Honda;T. Takeuchi;Y. Haga;K. Matsubayashi;Y. Uwatoko;Y. Onuki;田中雅臣;Y. Niimi;近藤猛
• 通讯作者: 近藤猛

Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor

• DOI: 10.1126/science.1248221
• 发表时间: 2014-05-09
• 期刊: SCIENCE
• 影响因子: 56.9
• 作者: He, Yang;Yin, Yi;Hoffman, J. E.
• 通讯作者: Hoffman, J. E.