High-resolution angle-resolved photoemission study of fine electronic states in electron-doped high-T_c superconductors

电子掺杂高温超导体精细电子态的高分辨率角分辨光电研究

• 批准号: 20840002
• 负责人: RICHARD Pierre
• 金额: $ 2.04万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (Start-up)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20840002/
• 关键词: 角度分解光電子分光; 超伝導; 強相関電子系

In order to elucidate the origin of superconductivity in high-T_c cuprates, it is indispensable to systematically investigate the electronic states of various superconductors and compare their electronic states with cuprates. Recently-discovered iron-pnictide superconductor is the best candidate to approach this issue. In this research, we have performed high-resolution angle-resolved photoemission spectroscopy of iron-pnictide superconductors and elucidated basic electronic states such as Fermi surface and band structure. In addition, we have directly observed the superconducting gap and established the superconducting pairing symmetry. We also compared the experimental electronic states between the iron pnictides and electron-doped cuprates.

为了阐明高温铜酸盐超导的起源，系统地研究各种超导体的电子态并将其与铜酸盐的电子态进行比较是必不可少的。最近发现的铁磷基超导体是解决这个问题的最佳选择。在这项研究中，我们对铁磷族超导体进行了高分辨率角分辨光电子能谱分析，并阐明了费米表面和能带结构等基本电子态。此外，我们还直接观测到了超导能隙并建立了超导配对对称性。我们还比较了铁磷族化物和电子掺杂铜酸盐之间的实验电子态。

项目成果

Coexistence of competing orders with two energy gaps in real and momentum space in high-T_c superconductor Bi_2Sr_<2-x>La_xCuO_<6+d>

高温超导体Bi_2Sr_<2-x>La_xCuO_<6 d>中实空间和动量空间中具有两个能隙的竞争级共存

• 发表时间: 2008
• 期刊: Phys.Rev.Lett. 101
• 作者: J.-H. Ma;Z.-H. Pan;F. C. Niestemski;M. Neupane;Y.-M. Xu;P. Richard;K. Nakayama;T. Sato;T. Takahashi;H.-Q. Luo;L. Fang;H.-H. Wen;Ziqiang Wang;H. Ding;V. Madhavan
• 通讯作者: V. Madhavan

Observation of Fermi-surface-dependent nodeless supercoducting gaps in Ba_<0.6>K_<0.4>Fe_2As_2

Ba_<0.6>K_<0.4>Fe_2As_2 中费米面相关无节点超导带隙的观测

• 发表时间: 2008
• 期刊: Europhys.Lett. 83
• 作者: H. Ding;P. Richard;K. Nakayama;K. Sugawara;T. Arakane;Y. Sekiba;A. Takayama;S. Souma;T. Sato;T Takahashi;Z. Wang;X. Dai;Z. Fang;G. F. Chen;J. L. Luo;N. L. Wang
• 通讯作者: N. L. Wang

Evolution of Fermi surface and normal state gap in the chemically substituted cuprates Bi_2Sr_<2-x>Bi_xCuO_<6+d>

化学取代铜酸盐Bi_2Sr_<2-x>Bi_xCuO_<6 d>费米面和常态能隙的演化

• 发表时间: 2009
• 期刊: Phys.Rev.B 79
• 作者: Z.-H. Pan;P. Richard;Y.-M. Xu;M. Neupane;P. Bishay;A. V. Fedorov;H. Luo;L. Fang;H.-H. Wen;Z. Wang;H. Ding
• 通讯作者: H. Ding

ARPES on the new Fe-based superconductors : year 2(invited talk)

新型铁基超导体的 ARPES：第二年（特邀演讲）

• 发表时间: 2009
• 作者: P.Richard;et al.;P. Richard;P.Richard
• 通讯作者: P.Richard

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