Study of the inter-layer and intra-layer interactions in high-Tc superconducting states using low-energy synchrotron radiation

2009 Fiscal Year Final Research Report

• Project/Area Number: 20740199
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Hiroshima University
• Principal Investigator: INO Akihiro Hiroshima University, 大学院・理学研究科, 助教 (60363040)
• Project Period (FY): 2008 – 2009
• Keywords: 高温超伝導 / 角度分解光電子分光 / 電子構造 / 放射光

Research Abstract

Exploiting the high resolution and band selectivity of low-energy synchrotron-radiation angle-resolved-photoemission, we have directly determined fine quasiparticle structures in high-Tc cuprate superconductors. We found that weak in-plane potential disorder due to the out-of-plane impurities makes a strong pair-braking effect in d-wave superconducting state, and that it also makes a suppression of the screening by the electronic system, leading to the increase in electron-phonon interaction and elastic impurity scattering, and thus to the enhancement of the quasiparticle mass.

Research Products

• [Journal Article] Enhancement of oxygen isotope effect due to out-of-plane disorder in Bi2Sr2Ln0. 4CuO6+δsuperconductors (2009)
  • Author(s): K. Sato, H. Iwasawa, N.C. Plumb, T. Masui, Y. Yoshida, H. Eisaki, H. Bando, A. Ino, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, S. Tajima, Y. Nishihara, D.S. Dessau, Y. Aiura
  • Journal Title: Physical Review B 80 Pages: 212501/1-4
  • Peer Reviewed
• [Journal Article] Unusual Layer-Dependent Charge Distribution, Collective Mode Coupling, and Superconductivity in Multilayer Cuprate Ba2Ca3Cu4O8F2 (2009)
  • Author(s): Y. Chen, A. Iyo, W. Yang, A. Ino, M. Arita, S. Johnston, H. Eisaki, H. Namatame, M. Taniguchi, T.P. Devereaux, Z. Hussain, Z. -X. Shen
  • Journal Title: Physical Review Letters 103 Pages: 36403/1-4
  • Peer Reviewed
• [Journal Article] Sheet Dependence on Superconducting Gap in Oxygen-Deficient Iron-Based Oxypnictide Superconductors NdFeAsO0. 85 (2008)
  • Author(s): Y. Aiura, K. Sato, H. Iwasawa, Y. Nakashima, H. Anzai, A. Ino, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, I. Hase, K. Miyazawa, P.M. Shirage, H. Eisaki, H. Kito, A. Iyo
  • Journal Title: Journal of the Physical Society of Japan 77 Pages: 103712/1-4
  • Peer Reviewed
• [Journal Article] Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates (2008)
  • Author(s): H. Iwasawa, J.F. Douglas, K. Sato, T. Masui, Y. Yoshida, Z. Sun, H. Eisaki, H. Bando, A. Ino, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, S. Tajima, S. Uchida, T. Saitoh, D.S. Dessau, Y. Aiura
  • Journal Title: Physical Review Letters 101 Pages: 157005/1-4
  • Peer Reviewed
• [Presentation] Bi2212のノード近傍準粒子構造のドーピング依存性:低エネルギー放射光角度分解光電子分光 (2010)
  • Author(s): 安斎太陽
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山県岡山大学
  • Year and Date: 2010-03-20
• [Presentation] Low-energy ARPES study of novel multi-band superconductors at HiSOR (2009)
  • Author(s): Akihiro Ino
  • Organizer: 2nd UVSOR Workshop on Low-Energy Photoemission of Solids using Synchrotron Radiation (LEPES 09)
  • Place of Presentation: Okazaki, Japan
  • Year and Date: 2009-10-04
• [Presentation] 放射光角度分解光電子分光による高温超伝導電子状態と競合秩序 (2009)
  • Author(s): 井野明洋
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 東京都立教大学
  • Year and Date: 2009-03-29
• [Presentation] 低エネルギー放射光角度分解光電子分光によるBi_2Sr_<1.6>Ln_<0.4>Bi_2CuO_<6+δ>の面外乱れの効果の研究 (2009)
  • Author(s): 藤田泰輔
  • Organizer: 第22回日本放射光学会
  • Place of Presentation: 東京都東京大学
  • Year and Date: 2009-01-11
• [Presentation] Quasiparticle Fine Structures in Single-Layer and Bilayer Cuprates Studied by Low-Energy ARPES (2008)
  • Author(s): Akihiro Ino
  • Organizer: International Conference on Quantum Phenomena in Complex Matter of the series on Stripes and High-Tc Superconductivity (Stripes08)
  • Place of Presentation: Erice, Italy
  • Year and Date: 2008-07-28