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

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740218
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: KONDO Takeshi 東京大学, 物性研究所, 准教授 (40613310)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 角度分解光電子分光 / 酸化物高温超伝導体

Research Abstract

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.

Research Products

• [Journal Article] Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor (2014)
  • Author(s): Y. He,Y. Yin,M. Zech,A. Soumyanarayanan,M. M. Yee,T. Williams,M. C. Boyer,K. Chatterjee,W. D. Wise,I. Zeljkovic,T. Kondo,T. Takeuchi,H. Ikuta,P. Mistark,R. S. Markiewicz,A. Bansil,S. Sachdev,E. W. Hudson,and J. E. Hoffman
  • Journal Title: Science Volume: 344 Pages: 608
  • DOI: 10.1126/science.1248221
  • Peer Reviewed
• [Journal Article] Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6 (2013)
  • Author(s): M. Neupane,N. Alidoust,S.-Y. Xu,T. Kondo,Y. Ishida,D.J. Kim,C. Liu,I. Belopolski,Y.J. Jo,T.-R. Chang,H.-T. Jeng,T. Durakiewicz,L. Balicas,H. Lin,A. Bansil,S. Shin,Z. Fisk and M. Z. Hasan
  • Journal Title: Nature Communications Volume: 4 Pages: 2991
  • DOI: 10.1038/ncomms3991
  • Peer Reviewed
• [Journal Article] Formation of Gapless Fermi Arcs and Fingerprints of 0rder in the Pseudogap State of Cuprate Super- conductors (2013)
  • Author(s): T. Kondo,A. D. Palczewski,Y. Hamaya,T. Takeuchi,J. S. Wen,Z. J. Xu,G. Gu,and A. Kaminski
  • Journal Title: Physical Review Letters Volume: 111 Pages: 157003
  • DOI: 10.1103/PhysRevLett.111.157003
  • Peer Reviewed
• [Journal Article] Anomalous Doping Variation of the Nodal Low-Energy Feature of Superconducting (Bi,Pb)_2(Sr,La)_2Cu0_<6+δ> Crystals Revealed by Laser-Based Angle-Resolved Photoemission Spec- troscopy (2013)
  • Author(s): T. Kondo,Y. Nakashima,W. Malaeb,Y. Ishida,Y. Hamaya,T. Takeuchi,and S. Shin
  • Journal Title: Physical Review Letters Volume: 110 Pages: 217006
  • DOI: 10.1103/PhysRevLett.110.217006
  • Peer Reviewed
• [Journal Article] Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi2Se3,Bi_2Te_3,and Cu-Doped Bi_2Se_3 (2013)
  • Author(s): T. Kondo,Y. Nakashima,Y. 0ta,Y. Ishida,W. Malaeb,K. 0kazaki,M. Kriener,S. Sasaki,K. Segawa,Y. Ando,and S. Shin
  • Journal Title: Physical Review Letters Volume: 110 Pages: 217601
  • DOI: 10.1103/PhysRevLett.110.217601
  • Peer Reviewed
• [Presentation] ルテニウム酸化物Ca2_-xSrxRuO4の表面電子状態 : レーザー励起型角度分解光電子分光態 (2013)
  • Author(s): 近藤猛, Walid Malaeb,石田了章,谷口晴香,前野悦輝,中辻知,辛埴
  • Organizer: 日本物理学会
  • Place of Presentation: 徳島大学
  • Year and Date: 2013-09-28
• [Presentation] レーザー励起型角度分解光電子分光を用いて研究したルテニウム酸化物の表面電子状態 (2013)
  • Author(s): 近藤猛,中島祐貴,金井洋貴,谷口晴香, Walid Malaeb,石田了章, Chuangtian Chen,渡部俊太郎,前野悦輝,辛埴
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-29
• [Presentation] 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 (2012)
  • Author(s): 近藤猛,中島祐貴, Walid Malaeb,石田了章,浜谷陽ー郎,小川古都,竹内恒博, Chuangtian Chen,渡部俊太郎,辛埴
  • Organizer: 日本物理学会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-21